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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 1 |
| 6 | 1 |
| 7 | 1 |
| 8 | 1 |
| 9 | 1 |
| 10 | 23 |
| 11 | 303 |
| 12 | 6023 |
| 13 | 96925 |
| 14 | 1428753 |
| 15 | 19082405 |
| 16 | 238337055 |
| 17 | 2823649207 |
| 18 | 32155269155 |
| 19 | 354779733589 |
| 20 | 3815483693749 |
| 21 | 40182530936197 |
[1,1,1,1,1,1,1,1,1,23,303,6023,96925,1428753, 19082405,238337055,2823649207,32155269155, 354779733589,3815483693749,40182530936197] |