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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 1734 |
| 3 | 257416 |
| 4 | 20788531 |
| 5 | 1644385909 |
| 6 | 120672330232 |
| 7 | 8473366210380 |
| 8 | 577497122717510 |
| 9 | 38429377558548084 |
| 10 | 2510034447031636894 |
| 11 | 161474518006208921112 |
| 12 | 10257528561081995711619 |
| 13 | 644676948221905320696958 |
[0,1734,257416,20788531,1644385909,120672330232, 8473366210380,577497122717510,38429377558548084, 2510034447031636894,161474518006208921112, 10257528561081995711619,644676948221905320696958] |