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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 5688 |
| 4 | 504508320 |
| 5 | 2029169127793680 |
| 6 | 333772217080092664473600 |
| 7 | 1966297518276227170017585421188600 |
| 8 | 474436367892839446541884570454351985506872320 |
| 9 | 4529567636413022031420100639004131328550592354551163392000 |
| 10 | 1664947024157601976065851576560401128416782438266187161307818265349050000 |
[1,1,1,5688,504508320,2029169127793680, 333772217080092664473600, 1966297518276227170017585421188600, 474436367892839446541884570454351985506872320, 45295676364130220314201006390041313285505923545511\ 63392000, 16649470241576019760658515765604011284167824382661\ 87161307818265349050000] |