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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 6 |
| 3 | 12 |
| 4 | 30 |
| 5 | 42 |
| 6 | 45 |
| 7 | 75 |
| 8 | 126 |
| 9 | 105 |
| 10 | 175 |
| 11 | 135 |
| 12 | 255 |
| 13 | 195 |
| 14 | 285 |
| 15 | 345 |
| 16 | 435 |
| 17 | 315 |
| 18 | 693 |
| 19 | 405 |
| 20 | 525 |
| 21 | 765 |
| 22 | 585 |
[1,0,6,12,30,42,45,75,126,105,175,135,255,195,285, 345,435,315,693,405,525,765,585] |