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| n | a(n) |
|---|---|
| 5 | 1 |
| 6 | 15 |
| 7 | 2625 |
| 8 | 5145000 |
| 9 | 115500105000 |
| 10 | 31107065779125000 |
| 11 | 106290666272665586250000 |
| 12 | 4888916787397632685446712500000 |
| 13 | 3213029533312882851092617168726650000000 |
| 14 | 31994396252008620689512942684899448442297400000000 |
| 15 | 5110196342132990821731075942773950194550115556089232000000000 |
[1,15,2625,5145000,115500105000,31107065779125000, 106290666272665586250000, 4888916787397632685446712500000, 3213029533312882851092617168726650000000, 31994396252008620689512942684899448442297400000000\ , 51101963421329908217310759427739501945501155560892\ 32000000000] |