The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 4 |
| 4 | 1 |
| 5 | 4 |
| 6 | 9 |
| 7 | 54 |
| 8 | 47 |
| 9 | 376 |
| 10 | 385 |
| 11 | 3850 |
| 12 | 3839 |
| 13 | 46068 |
| 14 | 46081 |
| 15 | 645134 |
| 16 | 645119 |
| 17 | 10321904 |
| 18 | 10321921 |
| 19 | 185794578 |
| 20 | 185794559 |
| 21 | 3715891180 |
| 22 | 3715891201 |
| 23 | 81749606422 |
| 24 | 81749606399 |
| 25 | 1961990553576 |
| 26 | 1961990553601 |
| 27 | 51011754393626 |
| 28 | 51011754393599 |
| 29 | 1428329123020772 |
[1,2,4,1,4,9,54,47,376,385,3850,3839,46068,46081, 645134,645119,10321904,10321921,185794578, 185794559,3715891180,3715891201,81749606422, 81749606399,1961990553576,1961990553601, 51011754393626,51011754393599,1428329123020772] |