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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 5 |
| 5 | 64 |
| 6 | 655 |
| 7 | 5858 |
| 8 | 51369 |
| 9 | 448982 |
| 10 | 3967466 |
| 11 | 35603366 |
| 12 | 324990677 |
| 13 | 3016738988 |
| 14 | 28449849867 |
| 15 | 272233685444 |
| 16 | 2639649712580 |
| 17 | 25902435997188 |
[0,0,0,5,64,655,5858,51369,448982,3967466, 35603366,324990677,3016738988,28449849867, 272233685444,2639649712580,25902435997188] |