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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 12 |
| 4 | 183 |
| 5 | 8884 |
| 6 | 1495984 |
| 7 | 872987584 |
| 8 | 1787227218134 |
| 9 | 13013640978954744 |
| 10 | 341143259362180445672 |
| 11 | 32519497484526664873838560 |
| 12 | 11366387701006542223325518765872 |
| 13 | 14668949294272099348849331250968826816 |
[1,1,2,12,183,8884,1495984,872987584, 1787227218134,13013640978954744, 341143259362180445672,32519497484526664873838560, 11366387701006542223325518765872, 14668949294272099348849331250968826816] |