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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 3 |
| 3 | 25 |
| 4 | 443 |
| 5 | 13956 |
| 6 | 695902 |
| 7 | 50741797 |
| 8 | 5111573805 |
| 9 | 681834525328 |
| 10 | 116541746850536 |
| 11 | 24867348916368729 |
| 12 | 6485004673137022903 |
| 13 | 2030925802149476408320 |
| 14 | 752596112270275554372288 |
| 15 | 325867948175560635402364741 |
| 16 | 163084920731472027278428501433 |
[1,1,3,25,443,13956,695902,50741797,5111573805, 681834525328,116541746850536,24867348916368729, 6485004673137022903,2030925802149476408320, 752596112270275554372288, 325867948175560635402364741, 163084920731472027278428501433] |