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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 739 |
| 3 | 349247 |
| 4 | 135081772 |
| 5 | 46592981880 |
| 6 | 14921201253592 |
| 7 | 4536057410542618 |
| 8 | 1326832753715385794 |
| 9 | 376757242809990931884 |
| 10 | 104488934104327921610570 |
| 11 | 28428461728083557062643114 |
| 12 | 7612584440278089046630434316 |
| 13 | 2011372004697171339782546237013 |
[0,1,739,349247,135081772,46592981880, 14921201253592,4536057410542618, 1326832753715385794,376757242809990931884, 104488934104327921610570, 28428461728083557062643114, 7612584440278089046630434316, 2011372004697171339782546237013] |