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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 6 |
| 3 | 123 |
| 4 | 7108 |
| 5 | 1058885 |
| 6 | 386056326 |
| 7 | 332908216711 |
| 8 | 662759754883080 |
| 9 | 2991536714452469769 |
| 10 | 30189087071961437767690 |
| 11 | 673536638307789642838763531 |
| 12 | 32919693104791033024939149066252 |
| 13 | 3498056629389633452501822564131061773 |
| 14 | 802931613320922331646386276441560583143438 |
[1,1,6,123,7108,1058885,386056326,332908216711, 662759754883080,2991536714452469769, 30189087071961437767690, 673536638307789642838763531, 32919693104791033024939149066252, 3498056629389633452501822564131061773, 802931613320922331646386276441560583143438] |