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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 15 |
| 3 | 666 |
| 4 | 59230 |
| 5 | 8775075 |
| 6 | 1948891581 |
| 7 | 605698755508 |
| 8 | 250914820143996 |
| 9 | 133610836793706405 |
| 10 | 88919025666286620475 |
| 11 | 72317513878698256697166 |
| 12 | 70571883548815735717843290 |
| 13 | 81383769918571603591381635271 |
[1,1,15,666,59230,8775075,1948891581,605698755508, 250914820143996,133610836793706405, 88919025666286620475,72317513878698256697166, 70571883548815735717843290, 81383769918571603591381635271] |