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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 1240 |
| 3 | 27776 |
| 4 | 330460 |
| 5 | 2011776 |
| 6 | 7063784 |
| 7 | 14721280 |
| 8 | 18796230 |
| 9 | 14721280 |
| 10 | 7063784 |
| 11 | 2011776 |
| 12 | 330460 |
| 13 | 27776 |
| 14 | 1240 |
| 15 | 0 |
| 16 | 1 |
[1,0,1240,27776,330460,2011776,7063784,14721280, 18796230,14721280,7063784,2011776,330460,27776, 1240,0,1] |