The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 4 | 1 |
| 5 | 5 |
| 6 | 26 |
| 7 | 107 |
| 8 | 439 |
| 9 | 1663 |
| 10 | 6283 |
| 11 | 22912 |
| 12 | 83507 |
| 13 | 298936 |
| 14 | 1071564 |
| 15 | 3804461 |
| 16 | 13542785 |
| 17 | 47964338 |
| 18 | 170456957 |
| 19 | 604293910 |
| 20 | 2150604057 |
| 21 | 7647190962 |
| 22 | 27302834888 |
| 23 | 97491596984 |
| 24 | 349544018586 |
| 25 | 1254140950775 |
| 26 | 4517792721381 |
| 27 | 16291580640312 |
| 28 | 58974333255158 |
| 29 | 213744923737227 |
[1,5,26,107,439,1663,6283,22912,83507,298936, 1071564,3804461,13542785,47964338,170456957, 604293910,2150604057,7647190962,27302834888, 97491596984,349544018586,1254140950775, 4517792721381,16291580640312,58974333255158, 213744923737227] |