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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 24 |
| 3 | 2510 |
| 4 | 5210 |
| 5 | 8991 |
| 6 | 56384 |
| 7 | 348732 |
| 8 | 460719 |
| 9 | 867839 |
| 10 | 28997919 |
| 11 | 193889375 |
| 12 | 254181375 |
| 13 | 419321664 |
| 14 | 1018179999 |
| 15 | 2654951424 |
| 16 | 1297015971839 |
| 17 | 62061633644031 |
[0,24,2510,5210,8991,56384,348732,460719,867839, 28997919,193889375,254181375,419321664,1018179999, 2654951424,1297015971839,62061633644031] |