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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 4 |
| 3 | 10 |
| 4 | 110 |
| 5 | 12085 |
| 6 | 146047246 |
| 7 | 21329798064184488 |
| 8 | 454960285458888331666496499822180 |
| 9 | 206988861344833157526906045960863418528301538238377184771619952355 |
[1,4,10,110,12085,146047246,21329798064184488, 454960285458888331666496499822180, 20698886134483315752690604596086341852830153823837\ 7184771619952355] |