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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 24 |
| 3 | 77 |
| 4 | 126797 |
| 5 | 12714624 |
| 6 | 129079888464 |
| 7 | 77885018846797 |
| 8 | 4009565647007922 |
| 9 | 40750555532000002 |
[2,24,77,126797,12714624,129079888464, 77885018846797,4009565647007922,40750555532000002] |