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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 2 |
| 5 | 26 |
| 6 | 580 |
| 7 | 23116 |
| 8 | 1703182 |
| 9 | 237842582 |
| 10 | 64143512608 |
| 11 | 33852316389688 |
| 12 | 35268292090882874 |
| 13 | 72930742736413804146 |
| 14 | 300323342846133370497564 |
| 15 | 2467442527810798875863471748 |
| 16 | 40490661363717159406441954638982 |
| 17 | 1327931037076594186049396631983031214 |
[0,0,0,2,26,580,23116,1703182,237842582, 64143512608,33852316389688,35268292090882874, 72930742736413804146,300323342846133370497564, 2467442527810798875863471748, 40490661363717159406441954638982, 1327931037076594186049396631983031214] |