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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 24 |
| 3 | 572 |
| 4 | 20788 |
| 5 | 1021892 |
| 6 | 63498116 |
| 7 | 4776128772 |
| 8 | 422019084132 |
| 9 | 42854861672612 |
| 10 | 4918270207805188 |
| 11 | 629575456637707076 |
| 12 | 88938171122678982692 |
| 13 | 13744507646644260776292 |
| 14 | 2306659049841490720035780 |
| 15 | 417774877069420589127228164 |
| 16 | 81222489094387608969950071780 |
[1,2,24,572,20788,1021892,63498116,4776128772, 422019084132,42854861672612,4918270207805188, 629575456637707076,88938171122678982692, 13744507646644260776292,2306659049841490720035780, 417774877069420589127228164, 81222489094387608969950071780] |