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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 5 |
| 4 | 34 |
| 5 | 520 |
| 6 | 14397 |
| 7 | 993806 |
| 8 | 222547738 |
| 9 | 98753510701 |
| 10 | 66772601607218 |
| 11 | 82150206439975648 |
| 12 | 310163020349941301606 |
| 13 | 3022167582612808506550780 |
| 14 | 47176617497043375266215814522 |
| 15 | 1129578055293824008530028604347686 |
| 16 | 62478430488069985838347598494293429802 |
[1,1,2,5,34,520,14397,993806,222547738, 98753510701,66772601607218,82150206439975648, 310163020349941301606,3022167582612808506550780, 47176617497043375266215814522, 1129578055293824008530028604347686, 62478430488069985838347598494293429802] |