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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 208 |
| 4 | 3936 |
| 5 | 75346 |
| 6 | 1608428 |
| 7 | 34716434 |
| 8 | 745738376 |
| 9 | 16008740616 |
| 10 | 343710683498 |
| 11 | 7379808223044 |
| 12 | 158453102807678 |
| 13 | 3402179758062160 |
| 14 | 73048972852021136 |
| 15 | 1568451546991501818 |
| 16 | 33676593841059669470 |
| 17 | 723078147640347151670 |
[0,0,208,3936,75346,1608428,34716434,745738376, 16008740616,343710683498,7379808223044, 158453102807678,3402179758062160, 73048972852021136,1568451546991501818, 33676593841059669470,723078147640347151670] |