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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 5 |
| 3 | 251 |
| 4 | 359200 |
| 5 | 25822962624 |
| 6 | 141766192358448256 |
| 7 | 83301485967496541735457536 |
| 8 | 7013555995366382867427754604471779328 |
| 9 | 109330254486209621988088555707809713786027354619904 |
| 10 | 396335044092985772297627538614627390881554195217999599121962369024 |
[1,1,5,251,359200,25822962624,141766192358448256, 83301485967496541735457536, 7013555995366382867427754604471779328, 10933025448620962198808855570780971378602735461990\ 4, 39633504409298577229762753861462739088155419521799\ 9599121962369024] |