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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 1 |
| 3 | 3 |
| 4 | 18 |
| 5 | 250 |
| 6 | 5475 |
| 7 | 191541 |
| 8 | 11065572 |
| 9 | 1104254964 |
| 10 | 201167132805 |
| 11 | 69828691941415 |
| 12 | 47150542741904118 |
| 13 | 62354150876493659118 |
| 14 | 161919876753750972738791 |
| 15 | 827272271567137357352991705 |
| 16 | 8331016130913639432634637862600 |
| 17 | 165634930763383717802534343776893928 |
[0,0,1,3,18,250,5475,191541,11065572,1104254964, 201167132805,69828691941415,47150542741904118, 62354150876493659118,161919876753750972738791, 827272271567137357352991705, 8331016130913639432634637862600, 165634930763383717802534343776893928] |