| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 28690 |
| 6 | 717250 |
| 7 | 164250250 |
| 8 | 39390351505 |
| 9 | 5498418962110 |
| 10 | 430930711621830 |
| 11 | 19714914846904500 |
| 12 | 542987434093298560 |
| 13 | 9222363801696269312 |
| 14 | 98458872937331752960 |
| 15 | 670740325520798121984 |
[1,0,0,0,0,28690,717250,164250250,39390351505, 5498418962110,430930711621830,19714914846904500, 542987434093298560,9222363801696269312, 98458872937331752960,670740325520798121984] |