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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 10 |
| 3 | 237 |
| 4 | 10136 |
| 5 | 681830 |
| 6 | 66282252 |
| 7 | 8788976735 |
| 8 | 1524243696544 |
| 9 | 334865856398004 |
| 10 | 90881673885795860 |
| 11 | 29858122626266304359 |
| 12 | 11677994976873021545256 |
| 13 | 5361720126339948538293594 |
| 14 | 2855546302556932759342139236 |
| 15 | 1746070156439166014654366213055 |
| 16 | 1214894731067294065531422431608448 |
[1,1,10,237,10136,681830,66282252,8788976735, 1524243696544,334865856398004,90881673885795860, 29858122626266304359,11677994976873021545256, 5361720126339948538293594, 2855546302556932759342139236, 1746070156439166014654366213055, 1214894731067294065531422431608448] |