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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 14 |
| 3 | 144 |
| 4 | 1936 |
| 5 | 32000 |
| 6 | 625952 |
| 7 | 14117152 |
| 8 | 360175584 |
| 9 | 10246079616 |
| 10 | 321313928448 |
| 11 | 11006050602624 |
| 12 | 408662128569984 |
| 13 | 16344011453662464 |
| 14 | 700254206319007488 |
| 15 | 31990601456727585792 |
| 16 | 1551985176120589820928 |
| 17 | 79669906174753878177792 |
[1,2,14,144,1936,32000,625952,14117152,360175584, 10246079616,321313928448,11006050602624, 408662128569984,16344011453662464, 700254206319007488,31990601456727585792, 1551985176120589820928,79669906174753878177792] |