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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 5 |
| 3 | 44 |
| 4 | 493 |
| 5 | 6068 |
| 6 | 78674 |
| 7 | 1056756 |
| 8 | 14564701 |
| 9 | 204666202 |
| 10 | 2919462498 |
| 11 | 42143180174 |
| 12 | 614251526864 |
| 13 | 9024782449736 |
| 14 | 133489812361806 |
| 15 | 1985873221687284 |
| 16 | 29689739907869581 |
| 17 | 445797648515664064 |
| 18 | 6719243690952576928 |
[1,5,44,493,6068,78674,1056756,14564701,204666202, 2919462498,42143180174,614251526864,9024782449736, 133489812361806,1985873221687284, 29689739907869581,445797648515664064, 6719243690952576928] |