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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 31 |
| 2 | 629 |
| 3 | 10595 |
| 4 | 160965 |
| 5 | 2293347 |
| 6 | 31302517 |
| 7 | 414606643 |
| 8 | 5373114725 |
| 9 | 68512221635 |
| 10 | 862890573909 |
| 11 | 10764894286419 |
| 12 | 133300183232581 |
| 13 | 1640952361357795 |
| 14 | 20105879474257205 |
| 15 | 245421711656823923 |
[1,31,629,10595,160965,2293347,31302517,414606643, 5373114725,68512221635,862890573909, 10764894286419,133300183232581,1640952361357795, 20105879474257205,245421711656823923] |