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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 2 |
| 4 | 1 |
| 5 | 3 |
| 6 | 4 |
| 7 | 31 |
| 8 | 20 |
| 9 | 47 |
| 10 | 5832 |
| 11 | 322 |
| 12 | 84 |
| 13 | 4576568315415066934826490 |
| 14 | 324 |
| 15 | 843 |
| 16 | 480 |
| 17 | 3769607182320 |
| 18 | 2209 |
| 19 | 707932145558030519866865515025923563263974776037874477588352 |
| 20 | 69670959389872974262939756520 |
| 21 | 39603 |
[1,1,2,1,3,4,31,20,47,5832,322,84, 4576568315415066934826490,324,843,480, 3769607182320,2209, 70793214555803051986686551502592356326397477603787\ 4477588352,69670959389872974262939756520,39603] |