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| n | a(n) |
|---|---|
| 8 | 1430 |
| 9 | 175032 |
| 10 | 12597000 |
| 11 | 698377680 |
| 12 | 33079524324 |
| 13 | 1411221754800 |
| 14 | 55928745100800 |
| 15 | 2100173331484800 |
| 16 | 75727786603836510 |
| 17 | 2646827388046104120 |
| 18 | 90290940344491887000 |
| 19 | 3021580012515765901200 |
| 20 | 99583828881536195805180 |
| 21 | 3242049884573075122369680 |
[1430,175032,12597000,698377680,33079524324, 1411221754800,55928745100800,2100173331484800, 75727786603836510,2646827388046104120, 90290940344491887000,3021580012515765901200, 99583828881536195805180,3242049884573075122369680] |