The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 29 |
| 2 | 478 |
| 3 | 4287 |
| 4 | 24476 |
| 5 | 101785 |
| 6 | 337434 |
| 7 | 946043 |
| 8 | 2333752 |
| 9 | 5206581 |
| 10 | 10714070 |
| 11 | 20633239 |
| 12 | 37597908 |
| 13 | 65378417 |
| 14 | 109216786 |
| 15 | 176222355 |
| 16 | 275832944 |
| 17 | 420346573 |
| 18 | 625528782 |
| 19 | 911300591 |
| 20 | 1302512140 |
| 21 | 1829807049 |
| 22 | 2530582538 |
| 23 | 3450050347 |
| 24 | 4642403496 |
| 25 | 6172093925 |
| 26 | 8115226054 |
[0,29,478,4287,24476,101785,337434,946043,2333752, 5206581,10714070,20633239,37597908,65378417, 109216786,176222355,275832944,420346573,625528782, 911300591,1302512140,1829807049,2530582538, 3450050347,4642403496,6172093925,8115226054] |