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| n | a(n) |
|---|---|
| 2 | 2 |
| 3 | 86093440 |
| 4 | 5642133787008 |
| 5 | 19994654452125184 |
| 6 | 13120458818999011032 |
| 7 | 2852277353239208548608 |
| 8 | 283889181859169785013248 |
| 9 | 15786934495235533394850816 |
| 10 | 559374323532926110389380124 |
[2,86093440,5642133787008,19994654452125184, 13120458818999011032,2852277353239208548608, 283889181859169785013248, 15786934495235533394850816, 559374323532926110389380124] |