The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 16 |
| 2 | 286 |
| 3 | 614 |
| 4 | 2151 |
| 5 | 8269 |
| 6 | 29682 |
| 7 | 104376 |
| 8 | 369294 |
| 9 | 1307456 |
| 10 | 4626910 |
| 11 | 16374482 |
| 12 | 57956767 |
| 13 | 205128801 |
| 14 | 725997179 |
| 15 | 2569522383 |
| 16 | 9094341536 |
| 17 | 32187564037 |
| 18 | 113921464465 |
| 19 | 403202542814 |
| 20 | 1427055744748 |
| 21 | 5050782633800 |
| 22 | 17876250910601 |
[16,286,614,2151,8269,29682,104376,369294,1307456, 4626910,16374482,57956767,205128801,725997179, 2569522383,9094341536,32187564037,113921464465, 403202542814,1427055744748,5050782633800, 17876250910601] |