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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 11 |
| 3 | 118124 |
| 4 | 5056995703824 |
| 5 | 2677503356427960382362624 |
| 6 | 43103055200236892507668550744976954163200 |
| 7 | 44206966751754314698168885550132827351582613259130314424320000 |
[1,1,11,118124,5056995703824, 2677503356427960382362624, 43103055200236892507668550744976954163200, 44206966751754314698168885550132827351582613259130\ 314424320000] |