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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 8 |
| 3 | 124 |
| 4 | 3456 |
| 5 | 150656 |
| 6 | 9453056 |
| 7 | 807373568 |
| 8 | 90066059264 |
| 9 | 12716049596416 |
| 10 | 2216452086693888 |
| 11 | 467465806422867968 |
| 12 | 117332539562036035584 |
| 13 | 34562989958399757647872 |
| 14 | 11807922834511544081973248 |
| 15 | 4630865359842075866336067584 |
| 16 | 2066370767828213666946077425664 |
[1,1,8,124,3456,150656,9453056,807373568, 90066059264,12716049596416,2216452086693888, 467465806422867968,117332539562036035584, 34562989958399757647872, 11807922834511544081973248, 4630865359842075866336067584, 2066370767828213666946077425664] |