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| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 18 |
| 3 | 2925 |
| 4 | 11216538648 |
| 5 | 627285206516110230354416268831 |
| 6 | 109715796815760578436090875708748277077073796614051376195149103817368827024587948919162326 |
[3,18,2925,11216538648, 627285206516110230354416268831, 10971579681576057843609087570874827707707379661405\ 1376195149103817368827024587948919162326] |