Order 243.
| C1 | C2 | C3 | C4 | C5 | C6 | C7 | C8 | C9 | C10 | C11 | C12 | C13 | C14 | C15 | C16 | C17 | C18 | C19 | C20 | C21 | C22 | C23 | C24 | C25 | C26 | C27 | C28 | C29 | C30 | C31 | C32 | C33 | C34 | C35 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| size | 1 | 1 | 1 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 27 | 27 | 27 | 27 | 27 | 27 |
| order | 1 | 3 | 3 | 3 | 3 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 3 | 3 | 3 | 3 | 3 | 3 |
| χ1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| χ2 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | ||||||
| χ3 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | ||||||
| χ4 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | ||||||||||||||||||||||
| χ5 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | ||||||||||||||||||||||
| χ6 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | ||||||||||||||||||||||
| χ7 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | ||||||||||||||||||||||
| χ8 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | ||||||||||||||||||||||
| χ9 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | ||||||||||||||||||||||
| χ10 | 3 | 3 | 3 | 3 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||||||
| χ11 | 3 | 3 | 3 | 3 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||||||
| χ12 | 3 | 3 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | ζ+2ζ4 | ζ+2ζ4 | ζ+2ζ4 | ζ−ζ4 | ζ−ζ4 | ζ−ζ4 | −2ζ−ζ4 | −2ζ−ζ4 | −2ζ−ζ4 | 2ζ2+ζ5 | 2ζ2+ζ5 | 2ζ2+ζ5 | −ζ2+ζ5 | −ζ2+ζ5 | −ζ2+ζ5 | −ζ2−2ζ5 | −ζ2−2ζ5 | −ζ2−2ζ5 | 0 | 0 | 0 | 0 | 0 | 0 | ||
| χ13 | 3 | 3 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | ζ−ζ4 | ζ−ζ4 | ζ−ζ4 | −2ζ−ζ4 | −2ζ−ζ4 | −2ζ−ζ4 | ζ+2ζ4 | ζ+2ζ4 | ζ+2ζ4 | −ζ2+ζ5 | −ζ2+ζ5 | −ζ2+ζ5 | −ζ2−2ζ5 | −ζ2−2ζ5 | −ζ2−2ζ5 | 2ζ2+ζ5 | 2ζ2+ζ5 | 2ζ2+ζ5 | 0 | 0 | 0 | 0 | 0 | 0 | ||
| χ14 | 3 | 3 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | −2ζ−ζ4 | −2ζ−ζ4 | −2ζ−ζ4 | ζ+2ζ4 | ζ+2ζ4 | ζ+2ζ4 | ζ−ζ4 | ζ−ζ4 | ζ−ζ4 | −ζ2−2ζ5 | −ζ2−2ζ5 | −ζ2−2ζ5 | 2ζ2+ζ5 | 2ζ2+ζ5 | 2ζ2+ζ5 | −ζ2+ζ5 | −ζ2+ζ5 | −ζ2+ζ5 | 0 | 0 | 0 | 0 | 0 | 0 | ||
| χ15 | 3 | 3 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 2ζ2+ζ5 | 2ζ2+ζ5 | 2ζ2+ζ5 | −ζ2+ζ5 | −ζ2+ζ5 | −ζ2+ζ5 | −ζ2−2ζ5 | −ζ2−2ζ5 | −ζ2−2ζ5 | ζ−ζ4 | ζ−ζ4 | ζ−ζ4 | −2ζ−ζ4 | −2ζ−ζ4 | −2ζ−ζ4 | ζ+2ζ4 | ζ+2ζ4 | ζ+2ζ4 | 0 | 0 | 0 | 0 | 0 | 0 | ||
| χ16 | 3 | 3 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | −ζ2+ζ5 | −ζ2+ζ5 | −ζ2+ζ5 | −ζ2−2ζ5 | −ζ2−2ζ5 | −ζ2−2ζ5 | 2ζ2+ζ5 | 2ζ2+ζ5 | 2ζ2+ζ5 | −2ζ−ζ4 | −2ζ−ζ4 | −2ζ−ζ4 | ζ+2ζ4 | ζ+2ζ4 | ζ+2ζ4 | ζ−ζ4 | ζ−ζ4 | ζ−ζ4 | 0 | 0 | 0 | 0 | 0 | 0 | ||
| χ17 | 3 | 3 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | −ζ2−2ζ5 | −ζ2−2ζ5 | −ζ2−2ζ5 | 2ζ2+ζ5 | 2ζ2+ζ5 | 2ζ2+ζ5 | −ζ2+ζ5 | −ζ2+ζ5 | −ζ2+ζ5 | ζ+2ζ4 | ζ+2ζ4 | ζ+2ζ4 | ζ−ζ4 | ζ−ζ4 | ζ−ζ4 | −2ζ−ζ4 | −2ζ−ζ4 | −2ζ−ζ4 | 0 | 0 | 0 | 0 | 0 | 0 | ||
| χ18 | 3 | 0 | 0 | ζ+2ζ4 | ζ−ζ4 | −2ζ−ζ4 | 2ζ2+ζ5 | −ζ2+ζ5 | −ζ2−2ζ5 | 1+ζ+ζ8 | ζ2+ζ3+ζ4 | ζ5+ζ6+ζ7 | 1+ζ2+ζ7 | ζ+ζ3+ζ5 | ζ4+ζ6+ζ8 | 1+ζ4+ζ5 | ζ+ζ2+ζ6 | ζ3+ζ7+ζ8 | 1+ζ4+ζ5 | ζ+ζ2+ζ6 | ζ3+ζ7+ζ8 | 1+ζ+ζ8 | ζ2+ζ3+ζ4 | ζ5+ζ6+ζ7 | 1+ζ2+ζ7 | ζ+ζ3+ζ5 | ζ4+ζ6+ζ8 | 0 | 0 | 0 | 0 | 0 | 0 | ||
| χ19 | 3 | 0 | 0 | ζ+2ζ4 | ζ−ζ4 | −2ζ−ζ4 | 2ζ2+ζ5 | −ζ2+ζ5 | −ζ2−2ζ5 | ζ2+ζ3+ζ4 | ζ5+ζ6+ζ7 | 1+ζ+ζ8 | ζ+ζ3+ζ5 | ζ4+ζ6+ζ8 | 1+ζ2+ζ7 | ζ3+ζ7+ζ8 | 1+ζ4+ζ5 | ζ+ζ2+ζ6 | ζ+ζ2+ζ6 | ζ3+ζ7+ζ8 | 1+ζ4+ζ5 | ζ5+ζ6+ζ7 | 1+ζ+ζ8 | ζ2+ζ3+ζ4 | ζ4+ζ6+ζ8 | 1+ζ2+ζ7 | ζ+ζ3+ζ5 | 0 | 0 | 0 | 0 | 0 | 0 | ||
| χ20 | 3 | 0 | 0 | ζ+2ζ4 | ζ−ζ4 | −2ζ−ζ4 | 2ζ2+ζ5 | −ζ2+ζ5 | −ζ2−2ζ5 | ζ5+ζ6+ζ7 | 1+ζ+ζ8 | ζ2+ζ3+ζ4 | ζ4+ζ6+ζ8 | 1+ζ2+ζ7 | ζ+ζ3+ζ5 | ζ+ζ2+ζ6 | ζ3+ζ7+ζ8 | 1+ζ4+ζ5 | ζ3+ζ7+ζ8 | 1+ζ4+ζ5 | ζ+ζ2+ζ6 | ζ2+ζ3+ζ4 | ζ5+ζ6+ζ7 | 1+ζ+ζ8 | ζ+ζ3+ζ5 | ζ4+ζ6+ζ8 | 1+ζ2+ζ7 | 0 | 0 | 0 | 0 | 0 | 0 | ||
| χ21 | 3 | 0 | 0 | ζ−ζ4 | −2ζ−ζ4 | ζ+2ζ4 | −ζ2+ζ5 | −ζ2−2ζ5 | 2ζ2+ζ5 | 1+ζ2+ζ7 | ζ+ζ3+ζ5 | ζ4+ζ6+ζ8 | 1+ζ4+ζ5 | ζ3+ζ7+ζ8 | ζ+ζ2+ζ6 | 1+ζ+ζ8 | ζ5+ζ6+ζ7 | ζ2+ζ3+ζ4 | 1+ζ+ζ8 | ζ5+ζ6+ζ7 | ζ2+ζ3+ζ4 | 1+ζ2+ζ7 | ζ+ζ3+ζ5 | ζ4+ζ6+ζ8 | 1+ζ4+ζ5 | ζ3+ζ7+ζ8 | ζ+ζ2+ζ6 | 0 | 0 | 0 | 0 | 0 | 0 | ||
| χ22 | 3 | 0 | 0 | ζ−ζ4 | −2ζ−ζ4 | ζ+2ζ4 | −ζ2+ζ5 | −ζ2−2ζ5 | 2ζ2+ζ5 | ζ+ζ3+ζ5 | ζ4+ζ6+ζ8 | 1+ζ2+ζ7 | ζ3+ζ7+ζ8 | ζ+ζ2+ζ6 | 1+ζ4+ζ5 | ζ2+ζ3+ζ4 | 1+ζ+ζ8 | ζ5+ζ6+ζ7 | ζ5+ζ6+ζ7 | ζ2+ζ3+ζ4 | 1+ζ+ζ8 | ζ4+ζ6+ζ8 | 1+ζ2+ζ7 | ζ+ζ3+ζ5 | ζ+ζ2+ζ6 | 1+ζ4+ζ5 | ζ3+ζ7+ζ8 | 0 | 0 | 0 | 0 | 0 | 0 | ||
| χ23 | 3 | 0 | 0 | ζ−ζ4 | −2ζ−ζ4 | ζ+2ζ4 | −ζ2+ζ5 | −ζ2−2ζ5 | 2ζ2+ζ5 | ζ4+ζ6+ζ8 | 1+ζ2+ζ7 | ζ+ζ3+ζ5 | ζ+ζ2+ζ6 | 1+ζ4+ζ5 | ζ3+ζ7+ζ8 | ζ5+ζ6+ζ7 | ζ2+ζ3+ζ4 | 1+ζ+ζ8 | ζ2+ζ3+ζ4 | 1+ζ+ζ8 | ζ5+ζ6+ζ7 | ζ+ζ3+ζ5 | ζ4+ζ6+ζ8 | 1+ζ2+ζ7 | ζ3+ζ7+ζ8 | ζ+ζ2+ζ6 | 1+ζ4+ζ5 | 0 | 0 | 0 | 0 | 0 | 0 | ||
| χ24 | 3 | 0 | 0 | −2ζ−ζ4 | ζ+2ζ4 | ζ−ζ4 | −ζ2−2ζ5 | 2ζ2+ζ5 | −ζ2+ζ5 | 1+ζ4+ζ5 | ζ3+ζ7+ζ8 | ζ+ζ2+ζ6 | 1+ζ+ζ8 | ζ2+ζ3+ζ4 | ζ5+ζ6+ζ7 | 1+ζ2+ζ7 | ζ4+ζ6+ζ8 | ζ+ζ3+ζ5 | 1+ζ2+ζ7 | ζ4+ζ6+ζ8 | ζ+ζ3+ζ5 | 1+ζ4+ζ5 | ζ3+ζ7+ζ8 | ζ+ζ2+ζ6 | 1+ζ+ζ8 | ζ2+ζ3+ζ4 | ζ5+ζ6+ζ7 | 0 | 0 | 0 | 0 | 0 | 0 | ||
| χ25 | 3 | 0 | 0 | −2ζ−ζ4 | ζ+2ζ4 | ζ−ζ4 | −ζ2−2ζ5 | 2ζ2+ζ5 | −ζ2+ζ5 | ζ+ζ2+ζ6 | 1+ζ4+ζ5 | ζ3+ζ7+ζ8 | ζ5+ζ6+ζ7 | 1+ζ+ζ8 | ζ2+ζ3+ζ4 | ζ4+ζ6+ζ8 | ζ+ζ3+ζ5 | 1+ζ2+ζ7 | ζ+ζ3+ζ5 | 1+ζ2+ζ7 | ζ4+ζ6+ζ8 | ζ3+ζ7+ζ8 | ζ+ζ2+ζ6 | 1+ζ4+ζ5 | ζ2+ζ3+ζ4 | ζ5+ζ6+ζ7 | 1+ζ+ζ8 | 0 | 0 | 0 | 0 | 0 | 0 | ||
| χ26 | 3 | 0 | 0 | −2ζ−ζ4 | ζ+2ζ4 | ζ−ζ4 | −ζ2−2ζ5 | 2ζ2+ζ5 | −ζ2+ζ5 | ζ3+ζ7+ζ8 | ζ+ζ2+ζ6 | 1+ζ4+ζ5 | ζ2+ζ3+ζ4 | ζ5+ζ6+ζ7 | 1+ζ+ζ8 | ζ+ζ3+ζ5 | 1+ζ2+ζ7 | ζ4+ζ6+ζ8 | ζ4+ζ6+ζ8 | ζ+ζ3+ζ5 | 1+ζ2+ζ7 | ζ+ζ2+ζ6 | 1+ζ4+ζ5 | ζ3+ζ7+ζ8 | ζ5+ζ6+ζ7 | 1+ζ+ζ8 | ζ2+ζ3+ζ4 | 0 | 0 | 0 | 0 | 0 | 0 | ||
| χ27 | 3 | 0 | 0 | 2ζ2+ζ5 | −ζ2+ζ5 | −ζ2−2ζ5 | ζ−ζ4 | −2ζ−ζ4 | ζ+2ζ4 | 1+ζ4+ζ5 | ζ+ζ2+ζ6 | ζ3+ζ7+ζ8 | 1+ζ+ζ8 | ζ5+ζ6+ζ7 | ζ2+ζ3+ζ4 | 1+ζ2+ζ7 | ζ+ζ3+ζ5 | ζ4+ζ6+ζ8 | 1+ζ2+ζ7 | ζ+ζ3+ζ5 | ζ4+ζ6+ζ8 | 1+ζ4+ζ5 | ζ+ζ2+ζ6 | ζ3+ζ7+ζ8 | 1+ζ+ζ8 | ζ5+ζ6+ζ7 | ζ2+ζ3+ζ4 | 0 | 0 | 0 | 0 | 0 | 0 | ||
| χ28 | 3 | 0 | 0 | 2ζ2+ζ5 | −ζ2+ζ5 | −ζ2−2ζ5 | ζ−ζ4 | −2ζ−ζ4 | ζ+2ζ4 | ζ+ζ2+ζ6 | ζ3+ζ7+ζ8 | 1+ζ4+ζ5 | ζ5+ζ6+ζ7 | ζ2+ζ3+ζ4 | 1+ζ+ζ8 | ζ4+ζ6+ζ8 | 1+ζ2+ζ7 | ζ+ζ3+ζ5 | ζ+ζ3+ζ5 | ζ4+ζ6+ζ8 | 1+ζ2+ζ7 | ζ3+ζ7+ζ8 | 1+ζ4+ζ5 | ζ+ζ2+ζ6 | ζ2+ζ3+ζ4 | 1+ζ+ζ8 | ζ5+ζ6+ζ7 | 0 | 0 | 0 | 0 | 0 | 0 | ||
| χ29 | 3 | 0 | 0 | 2ζ2+ζ5 | −ζ2+ζ5 | −ζ2−2ζ5 | ζ−ζ4 | −2ζ−ζ4 | ζ+2ζ4 | ζ3+ζ7+ζ8 | 1+ζ4+ζ5 | ζ+ζ2+ζ6 | ζ2+ζ3+ζ4 | 1+ζ+ζ8 | ζ5+ζ6+ζ7 | ζ+ζ3+ζ5 | ζ4+ζ6+ζ8 | 1+ζ2+ζ7 | ζ4+ζ6+ζ8 | 1+ζ2+ζ7 | ζ+ζ3+ζ5 | ζ+ζ2+ζ6 | ζ3+ζ7+ζ8 | 1+ζ4+ζ5 | ζ5+ζ6+ζ7 | ζ2+ζ3+ζ4 | 1+ζ+ζ8 | 0 | 0 | 0 | 0 | 0 | 0 | ||
| χ30 | 3 | 0 | 0 | −ζ2+ζ5 | −ζ2−2ζ5 | 2ζ2+ζ5 | −2ζ−ζ4 | ζ+2ζ4 | ζ−ζ4 | 1+ζ+ζ8 | ζ5+ζ6+ζ7 | ζ2+ζ3+ζ4 | 1+ζ2+ζ7 | ζ4+ζ6+ζ8 | ζ+ζ3+ζ5 | 1+ζ4+ζ5 | ζ3+ζ7+ζ8 | ζ+ζ2+ζ6 | 1+ζ4+ζ5 | ζ3+ζ7+ζ8 | ζ+ζ2+ζ6 | 1+ζ+ζ8 | ζ5+ζ6+ζ7 | ζ2+ζ3+ζ4 | 1+ζ2+ζ7 | ζ4+ζ6+ζ8 | ζ+ζ3+ζ5 | 0 | 0 | 0 | 0 | 0 | 0 | ||
| χ31 | 3 | 0 | 0 | −ζ2+ζ5 | −ζ2−2ζ5 | 2ζ2+ζ5 | −2ζ−ζ4 | ζ+2ζ4 | ζ−ζ4 | ζ2+ζ3+ζ4 | 1+ζ+ζ8 | ζ5+ζ6+ζ7 | ζ+ζ3+ζ5 | 1+ζ2+ζ7 | ζ4+ζ6+ζ8 | ζ3+ζ7+ζ8 | ζ+ζ2+ζ6 | 1+ζ4+ζ5 | ζ+ζ2+ζ6 | 1+ζ4+ζ5 | ζ3+ζ7+ζ8 | ζ5+ζ6+ζ7 | ζ2+ζ3+ζ4 | 1+ζ+ζ8 | ζ4+ζ6+ζ8 | ζ+ζ3+ζ5 | 1+ζ2+ζ7 | 0 | 0 | 0 | 0 | 0 | 0 | ||
| χ32 | 3 | 0 | 0 | −ζ2+ζ5 | −ζ2−2ζ5 | 2ζ2+ζ5 | −2ζ−ζ4 | ζ+2ζ4 | ζ−ζ4 | ζ5+ζ6+ζ7 | ζ2+ζ3+ζ4 | 1+ζ+ζ8 | ζ4+ζ6+ζ8 | ζ+ζ3+ζ5 | 1+ζ2+ζ7 | ζ+ζ2+ζ6 | 1+ζ4+ζ5 | ζ3+ζ7+ζ8 | ζ3+ζ7+ζ8 | ζ+ζ2+ζ6 | 1+ζ4+ζ5 | ζ2+ζ3+ζ4 | 1+ζ+ζ8 | ζ5+ζ6+ζ7 | ζ+ζ3+ζ5 | 1+ζ2+ζ7 | ζ4+ζ6+ζ8 | 0 | 0 | 0 | 0 | 0 | 0 | ||
| χ33 | 3 | 0 | 0 | −ζ2−2ζ5 | 2ζ2+ζ5 | −ζ2+ζ5 | ζ+2ζ4 | ζ−ζ4 | −2ζ−ζ4 | 1+ζ2+ζ7 | ζ4+ζ6+ζ8 | ζ+ζ3+ζ5 | 1+ζ4+ζ5 | ζ+ζ2+ζ6 | ζ3+ζ7+ζ8 | 1+ζ+ζ8 | ζ2+ζ3+ζ4 | ζ5+ζ6+ζ7 | 1+ζ+ζ8 | ζ2+ζ3+ζ4 | ζ5+ζ6+ζ7 | 1+ζ2+ζ7 | ζ4+ζ6+ζ8 | ζ+ζ3+ζ5 | 1+ζ4+ζ5 | ζ+ζ2+ζ6 | ζ3+ζ7+ζ8 | 0 | 0 | 0 | 0 | 0 | 0 | ||
| χ34 | 3 | 0 | 0 | −ζ2−2ζ5 | 2ζ2+ζ5 | −ζ2+ζ5 | ζ+2ζ4 | ζ−ζ4 | −2ζ−ζ4 | ζ+ζ3+ζ5 | 1+ζ2+ζ7 | ζ4+ζ6+ζ8 | ζ3+ζ7+ζ8 | 1+ζ4+ζ5 | ζ+ζ2+ζ6 | ζ2+ζ3+ζ4 | ζ5+ζ6+ζ7 | 1+ζ+ζ8 | ζ5+ζ6+ζ7 | 1+ζ+ζ8 | ζ2+ζ3+ζ4 | ζ4+ζ6+ζ8 | ζ+ζ3+ζ5 | 1+ζ2+ζ7 | ζ+ζ2+ζ6 | ζ3+ζ7+ζ8 | 1+ζ4+ζ5 | 0 | 0 | 0 | 0 | 0 | 0 | ||
| χ35 | 3 | 0 | 0 | −ζ2−2ζ5 | 2ζ2+ζ5 | −ζ2+ζ5 | ζ+2ζ4 | ζ−ζ4 | −2ζ−ζ4 | ζ4+ζ6+ζ8 | ζ+ζ3+ζ5 | 1+ζ2+ζ7 | ζ+ζ2+ζ6 | ζ3+ζ7+ζ8 | 1+ζ4+ζ5 | ζ5+ζ6+ζ7 | 1+ζ+ζ8 | ζ2+ζ3+ζ4 | ζ2+ζ3+ζ4 | ζ5+ζ6+ζ7 | 1+ζ+ζ8 | ζ+ζ3+ζ5 | 1+ζ2+ζ7 | ζ4+ζ6+ζ8 | ζ3+ζ7+ζ8 | 1+ζ4+ζ5 | ζ+ζ2+ζ6 | 0 | 0 | 0 | 0 | 0 | 0 |
Here ζ is a primitive root of unity of order 9 (ζ9 = 1); i = ζ2.