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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 13 |
| 2 | 234 |
| 3 | 5382 |
| 4 | 150696 |
| 5 | 4972968 |
| 6 | 188972784 |
| 7 | 8125829712 |
| 8 | 390039826176 |
| 9 | 20672110787328 |
| 10 | 1198982425665024 |
| 11 | 75535892816896512 |
| 12 | 5136440711548962816 |
| 13 | 374960171943074285568 |
| 14 | 29246893411559794274304 |
[1,13,234,5382,150696,4972968,188972784, 8125829712,390039826176,20672110787328, 1198982425665024,75535892816896512, 5136440711548962816,374960171943074285568, 29246893411559794274304] |