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| n | a(n) |
|---|---|
| 9 | 1 |
| 10 | 5 |
| 11 | 35 |
| 12 | 189 |
| 13 | 1088 |
| 14 | 5896 |
| 15 | 32419 |
| 16 | 178832 |
| 17 | 989799 |
| 18 | 5540426 |
| 19 | 31252470 |
| 20 | 178571351 |
| 21 | 1030696863 |
| 22 | 6025834797 |
| 23 | 35625675885 |
| 24 | 213326126842 |
| 25 | 1292327704580 |
| 26 | 7927146783432 |
| 27 | 49194730886734 |
| 28 | 309011198106985 |
| 29 | 1963433004838204 |
| 30 | 12622320085676279 |
| 31 | 82061043600221160 |
[1,5,35,189,1088,5896,32419,178832,989799,5540426, 31252470,178571351,1030696863,6025834797, 35625675885,213326126842,1292327704580, 7927146783432,49194730886734,309011198106985, 1963433004838204,12622320085676279, 82061043600221160] |