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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 91725480 |
| 7 | 12321033120 |
| 8 | 883104563880 |
| 9 | 38285677029600 |
| 10 | 1114974568267560 |
| 11 | 23541174384003360 |
| 12 | 381121311416685840 |
| 13 | 4936856690461116960 |
| 14 | 52888385930118555960 |
| 15 | 481042560344215826880 |
[1,0,0,0,0,0,91725480,12321033120,883104563880, 38285677029600,1114974568267560,23541174384003360, 381121311416685840,4936856690461116960, 52888385930118555960,481042560344215826880] |