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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 17 |
| 3 | 18 |
| 4 | 629 |
| 5 | 647 |
| 6 | 10981 |
| 7 | 11628 |
| 8 | 406333 |
| 9 | 417961 |
| 10 | 7093709 |
| 11 | 7511670 |
| 12 | 262490489 |
| 13 | 270002159 |
| 14 | 4582525033 |
| 15 | 4852527192 |
| 16 | 169568449561 |
| 17 | 174420976753 |
| 18 | 2960304077609 |
| 19 | 3134725054362 |
| 20 | 109540955925917 |
| 21 | 112675680980279 |
| 22 | 1912351851610381 |
| 23 | 2025027532590660 |
[1,1,17,18,629,647,10981,11628,406333,417961, 7093709,7511670,262490489,270002159,4582525033, 4852527192,169568449561,174420976753, 2960304077609,3134725054362,109540955925917, 112675680980279,1912351851610381,2025027532590660] |