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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 1 |
| 3 | 33 |
| 4 | 3798 |
| 5 | 960152 |
| 6 | 577747260 |
| 7 | 859484671068 |
| 8 | 3228364497866668 |
| 9 | 31015380724025975076 |
| 10 | 768618082059444147510936 |
| 11 | 49424325752577827724130126584 |
| 12 | 8281603003824497703886704133613172 |
[0,1,33,3798,960152,577747260,859484671068, 3228364497866668,31015380724025975076, 768618082059444147510936, 49424325752577827724130126584, 8281603003824497703886704133613172] |