The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 8 |
| 1 | 33 |
| 2 | 161 |
| 3 | 730 |
| 4 | 3435 |
| 5 | 15887 |
| 6 | 74148 |
| 7 | 344483 |
| 8 | 1604473 |
| 9 | 7462786 |
| 10 | 34738575 |
| 11 | 161631659 |
| 12 | 752241404 |
| 13 | 3500410439 |
| 14 | 16290047469 |
| 15 | 75805472562 |
| 16 | 352771994195 |
| 17 | 1641641366551 |
| 18 | 7639557462868 |
| 19 | 35551227927131 |
| 20 | 165441007206577 |
| 21 | 769893052530306 |
| 22 | 3582766049751239 |
| 23 | 16672702423031411 |
| 24 | 77587874702105452 |
[8,33,161,730,3435,15887,74148,344483,1604473, 7462786,34738575,161631659,752241404,3500410439, 16290047469,75805472562,352771994195, 1641641366551,7639557462868,35551227927131, 165441007206577,769893052530306,3582766049751239, 16672702423031411,77587874702105452] |