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| n | a(n) |
|---|---|
| 1 | 24 |
| 2 | 2 |
| 3 | 3 |
| 4 | 3 |
| 5 | 55 |
| 6 | 1326 |
| 7 | 27712 |
| 8 | 392186 |
| 9 | 4032703 |
| 10 | 32764364 |
| 11 | 226023332 |
| 12 | 1430681509 |
| 13 | 9543107724 |
| 14 | 82643484977 |
| 15 | 972268357237 |
| 16 | 12735190843783 |
| 17 | 158717662004902 |
| 18 | 1789867783195227 |
[24,2,3,3,55,1326,27712,392186,4032703,32764364, 226023332,1430681509,9543107724,82643484977, 972268357237,12735190843783,158717662004902, 1789867783195227] |