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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 40 |
| 4 | 1225 |
| 5 | 67956 |
| 6 | 5986134 |
| 7 | 769550496 |
| 8 | 136151219061 |
| 9 | 31753157473180 |
| 10 | 9445432588519642 |
| 11 | 3491687484842443536 |
| 12 | 1570713950508131878618 |
| 13 | 845034544811095556274280 |
| 14 | 535857105694970626486925100 |
| 15 | 395590680969537758258609408640 |
| 16 | 336386798400777928783348084420365 |
[1,3,40,1225,67956,5986134,769550496,136151219061, 31753157473180,9445432588519642, 3491687484842443536,1570713950508131878618, 845034544811095556274280, 535857105694970626486925100, 395590680969537758258609408640, 336386798400777928783348084420365] |