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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 272 |
| 5 | 35170 |
| 6 | 1003084 |
| 7 | 29871142 |
| 8 | 868791100 |
| 9 | 24721336666 |
| 10 | 701187061974 |
| 11 | 19798661847118 |
| 12 | 557586299587882 |
| 13 | 15690379898303712 |
| 14 | 441277842759233828 |
| 15 | 12407050648291828460 |
| 16 | 348792620454513108888 |
| 17 | 9804667043727528098580 |
[0,0,0,272,35170,1003084,29871142,868791100, 24721336666,701187061974,19798661847118, 557586299587882,15690379898303712, 441277842759233828,12407050648291828460, 348792620454513108888,9804667043727528098580] |