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| n | a(n) |
|---|---|
| 7 | 1 |
| 8 | 1 |
| 9 | 8 |
| 10 | 725 |
| 11 | 2806508 |
| 12 | 27033154065 |
| 13 | 376962851057235 |
| 14 | 7292080848843162283 |
| 15 | 192271946945501178473766 |
| 16 | 6811960423672201527406129366 |
| 17 | 320020341797819074616734725607588 |
| 18 | 19688392653216509161510863093984500501 |
[1,1,8,725,2806508,27033154065,376962851057235, 7292080848843162283,192271946945501178473766, 6811960423672201527406129366, 320020341797819074616734725607588, 19688392653216509161510863093984500501] |