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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 23409 |
| 3 | 9648721 |
| 4 | 39401919001 |
| 5 | 74192202677913 |
| 6 | 211788908613601649 |
| 7 | 517069529154777840681 |
| 8 | 1369385680210307625221600 |
| 9 | 3514075326766461571852637721 |
| 10 | 9167946522672764796730050799825 |
[1,23409,9648721,39401919001,74192202677913, 211788908613601649,517069529154777840681, 1369385680210307625221600, 3514075326766461571852637721, 9167946522672764796730050799825] |