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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 5 |
| 3 | 44 |
| 4 | 711 |
| 5 | 21464 |
| 6 | 1220881 |
| 7 | 131393852 |
| 8 | 26816872052 |
| 9 | 10394515165440 |
| 10 | 7659334578853703 |
| 11 | 10736651986556444032 |
| 12 | 28645789175160296213419 |
| 13 | 145524991952628629000779856 |
| 14 | 1408095497232794991798389383499 |
[1,5,44,711,21464,1220881,131393852,26816872052, 10394515165440,7659334578853703, 10736651986556444032,28645789175160296213419, 145524991952628629000779856, 1408095497232794991798389383499] |