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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 5 |
| 3 | 52 |
| 4 | 1445 |
| 5 | 104116 |
| 6 | 16379797 |
| 7 | 6067246144 |
| 8 | 5270005429705 |
| 9 | 9832425683734288 |
| 10 | 40944833826904310921 |
| 11 | 384044953998005246634304 |
| 12 | 7656468877618298485395299533 |
| 13 | 332312769563869315072667521436992 |
| 14 | 31885558406529826494376921134421228189 |
[1,1,5,52,1445,104116,16379797,6067246144, 5270005429705,9832425683734288, 40944833826904310921,384044953998005246634304, 7656468877618298485395299533, 332312769563869315072667521436992, 31885558406529826494376921134421228189] |