The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 3 | 2 |
| 4 | 5 |
| 5 | 12 |
| 6 | 29 |
| 7 | 66 |
| 8 | 145 |
| 9 | 315 |
| 10 | 676 |
| 11 | 1436 |
| 12 | 3031 |
| 13 | 6367 |
| 14 | 13323 |
| 15 | 27798 |
| 16 | 57873 |
| 17 | 120281 |
| 18 | 249657 |
| 19 | 517663 |
| 20 | 1072520 |
| 21 | 2220724 |
| 22 | 4595938 |
| 23 | 9508022 |
| 24 | 19664296 |
| 25 | 40659943 |
| 26 | 84057614 |
| 27 | 173750589 |
| 28 | 359110196 |
| 29 | 742150185 |
| 30 | 1533651213 |
| 31 | 3169118648 |
| 32 | 6548358736 |
| 33 | 13530454573 |
| 34 | 27956404705 |
[2,5,12,29,66,145,315,676,1436,3031,6367,13323, 27798,57873,120281,249657,517663,1072520,2220724, 4595938,9508022,19664296,40659943,84057614, 173750589,359110196,742150185,1533651213, 3169118648,6548358736,13530454573,27956404705] |