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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 5 |
| 4 | 55 |
| 5 | 959 |
| 6 | 31883 |
| 7 | 2076383 |
| 8 | 267530657 |
| 9 | 68644357201 |
| 10 | 35172312944057 |
| 11 | 36025019516955853 |
| 12 | 73784654524456043287 |
| 13 | 302228644804839247744495 |
| 14 | 2475873364061564307502565395 |
| 15 | 40564787473148108729970731074007 |
| 16 | 1329227698679709317077126629247388161 |
[1,1,1,5,55,959,31883,2076383,267530657, 68644357201,35172312944057,36025019516955853, 73784654524456043287,302228644804839247744495, 2475873364061564307502565395, 40564787473148108729970731074007, 1329227698679709317077126629247388161] |