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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 0 |
| 3 | 32 |
| 4 | 1094 |
| 5 | 23055 |
| 6 | 405475 |
| 7 | 6575842 |
| 8 | 102567444 |
| 9 | 1569195485 |
| 10 | 23775369725 |
| 11 | 358461659952 |
| 12 | 5391042181294 |
| 13 | 80974624209115 |
| 14 | 1215462744452775 |
| 15 | 18238484835400862 |
| 16 | 273628186560143144 |
| 17 | 4104820038944901945 |
[0,0,0,32,1094,23055,405475,6575842,102567444, 1569195485,23775369725,358461659952,5391042181294, 80974624209115,1215462744452775,18238484835400862, 273628186560143144,4104820038944901945] |