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| n | a(n) |
|---|---|
| 0 | 40 |
| 1 | 5000 |
| 2 | 472500 |
| 3 | 43218000 |
| 4 | 4148928000 |
| 5 | 432081216000 |
| 6 | 49509306000000 |
| 7 | 6275893932000000 |
| 8 | 881135508052800000 |
| 9 | 136878615942868800000 |
| 10 | 23474682634201999200000 |
| 11 | 4432282735129048800000000 |
| 12 | 918537831584839065600000000 |
| 13 | 208281986149676045967360000000 |
| 14 | 51516317681413623440962560000000 |
[40,5000,472500,43218000,4148928000,432081216000, 49509306000000,6275893932000000, 881135508052800000,136878615942868800000, 23474682634201999200000,4432282735129048800000000, 918537831584839065600000000, 208281986149676045967360000000, 51516317681413623440962560000000] |