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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 3432 |
| 3 | 141858288 |
| 4 | 40309820014464 |
| 5 | 53321581727982247680 |
| 6 | 238681094467043912358445056 |
| 7 | 2924960829706245011243295851200512 |
| 8 | 84750120431280677998861681616641721991168 |
| 9 | 5208807724759446156144077076658272647436908396544 |
[1,1,3432,141858288,40309820014464, 53321581727982247680,238681094467043912358445056, 2924960829706245011243295851200512, 84750120431280677998861681616641721991168, 5208807724759446156144077076658272647436908396544] |