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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 14 |
| 3 | 994 |
| 4 | 6917246 |
| 5 | 430634636937890 |
| 6 | 2039908095836912108987531110990 |
| 7 | 54095925512992695768212345567905438957243461489279855615252290 |
[1,2,14,994,6917246,430634636937890, 2039908095836912108987531110990, 54095925512992695768212345567905438957243461489279\ 855615252290] |