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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 1 |
| 3 | 10 |
| 4 | 297 |
| 5 | 13756 |
| 6 | 925705 |
| 7 | 85394646 |
| 8 | 10351036465 |
| 9 | 1596005408152 |
| 10 | 305104214112561 |
| 11 | 70830194649795010 |
| 12 | 19629681235869138841 |
| 13 | 6401745422388206166420 |
| 14 | 2427004973632598297444857 |
| 15 | 1058435896607583305978409166 |
| 16 | 526149167104704966948064477665 |
[1,0,1,10,297,13756,925705,85394646,10351036465, 1596005408152,305104214112561,70830194649795010, 19629681235869138841,6401745422388206166420, 2427004973632598297444857, 1058435896607583305978409166, 526149167104704966948064477665] |