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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 19 |
| 3 | 333 |
| 4 | 8862 |
| 5 | 322885 |
| 6 | 15061381 |
| 7 | 858280605 |
| 8 | 57766424400 |
| 9 | 4479377168841 |
| 10 | 392785285842806 |
| 11 | 38393983653735732 |
| 12 | 4136603248470746422 |
| 13 | 486806030644218961182 |
| 14 | 62109988002922704031388 |
| 15 | 8537900524822110186179616 |
[1,2,19,333,8862,322885,15061381,858280605, 57766424400,4479377168841,392785285842806, 38393983653735732,4136603248470746422, 486806030644218961182,62109988002922704031388, 8537900524822110186179616] |