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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 477638700 |
| 3 | 46295775130831740013500 |
| 4 | 693090538757877947419844421229560759330 |
| 5 | 2879839278762149413553488830486463735739514876362382240000 |
[1,477638700,46295775130831740013500, 693090538757877947419844421229560759330, 28798392787621494135534888304864637357395148763623\ 82240000] |