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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 6 |
| 2 | 81 |
| 3 | 1788 |
| 4 | 55785 |
| 5 | 2267298 |
| 6 | 114015825 |
| 7 | 6848257272 |
| 8 | 478929874257 |
| 9 | 38253577287870 |
| 10 | 3437561332041969 |
| 11 | 343381977748134900 |
| 12 | 37755068758105209849 |
| 13 | 4531920849132497127258 |
| 14 | 589779214651388664049905 |
| 15 | 82722149483353129407482352 |
| 16 | 12440903535778778244423710625 |
| 17 | 1997259670949248788135594940278 |
[1,6,81,1788,55785,2267298,114015825,6848257272, 478929874257,38253577287870,3437561332041969, 343381977748134900,37755068758105209849, 4531920849132497127258,589779214651388664049905, 82722149483353129407482352, 12440903535778778244423710625, 1997259670949248788135594940278] |