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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 1 |
| 7 | 20349 |
| 8 | 21426300 |
| 9 | 8956859646 |
| 10 | 2352103292070 |
| 11 | 470090359867986 |
| 12 | 79002015147719136 |
| 13 | 11836068369346126698 |
| 14 | 1640443794179544776604 |
| 15 | 215598057543037336382670 |
| 16 | 27336005392867324870778880 |
| 17 | 3385297472808136707459580488 |
| 18 | 413211903044379104303226531072 |
[0,0,0,0,0,1,20349,21426300,8956859646, 2352103292070,470090359867986,79002015147719136, 11836068369346126698,1640443794179544776604, 215598057543037336382670, 27336005392867324870778880, 3385297472808136707459580488, 413211903044379104303226531072] |