The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 13 |
| 2 | 105 |
| 3 | 101 |
| 4 | 374 |
| 5 | 1034 |
| 6 | 2653 |
| 7 | 6426 |
| 8 | 16855 |
| 9 | 42256 |
| 10 | 110818 |
| 11 | 293243 |
| 12 | 759597 |
| 13 | 1962550 |
| 14 | 5113934 |
| 15 | 13247520 |
| 16 | 34363929 |
| 17 | 89475407 |
| 18 | 232484569 |
| 19 | 603475499 |
| 20 | 1568532379 |
| 21 | 4074861880 |
| 22 | 10582600325 |
| 23 | 27499026562 |
| 24 | 71450610025 |
| 25 | 185607848522 |
[13,105,101,374,1034,2653,6426,16855,42256,110818, 293243,759597,1962550,5113934,13247520,34363929, 89475407,232484569,603475499,1568532379, 4074861880,10582600325,27499026562,71450610025, 185607848522] |