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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 23 |
| 3 | 588 |
| 4 | 24553 |
| 5 | 1438112 |
| 6 | 108469917 |
| 7 | 9996042284 |
| 8 | 1086997811325 |
| 9 | 136102249609224 |
| 10 | 19269396089593156 |
| 11 | 3042212958893941456 |
| 12 | 529708789768374664407 |
| 13 | 100813134967124531098768 |
| 14 | 20816198414187782633783462 |
| 15 | 4634136282168760818748363080 |
[1,2,23,588,24553,1438112,108469917,9996042284, 1086997811325,136102249609224,19269396089593156, 3042212958893941456,529708789768374664407, 100813134967124531098768, 20816198414187782633783462, 4634136282168760818748363080] |