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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 8464 |
| 4 | 15018688 |
| 5 | 6501577152 |
| 6 | 1585757994496 |
| 7 | 290861341616496 |
| 8 | 45679059507623040 |
| 9 | 6563622028755987104 |
| 10 | 895009629522636673728 |
| 11 | 118277136569294999638992 |
| 12 | 15337783893522951844828992 |
| 13 | 1966328218272794506172178816 |
| 14 | 250347808250994150312231611520 |
[0,0,8464,15018688,6501577152,1585757994496, 290861341616496,45679059507623040, 6563622028755987104,895009629522636673728, 118277136569294999638992, 15337783893522951844828992, 1966328218272794506172178816, 250347808250994150312231611520] |