The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 13 | 15 |
| 14 | 857 |
| 15 | 21129 |
| 16 | 361154 |
| 17 | 5138182 |
| 18 | 66407157 |
| 19 | 816411988 |
| 20 | 9796844472 |
| 21 | 116493895521 |
| 22 | 1385342513224 |
| 23 | 16571907424860 |
| 24 | 200166968890873 |
| 25 | 2447436683633895 |
| 26 | 30343738969483443 |
| 27 | 381914993014556712 |
| 28 | 4883614045607479339 |
| 29 | 63476602847240143719 |
| 30 | 838919983940694715522 |
[15,857,21129,361154,5138182,66407157,816411988, 9796844472,116493895521,1385342513224, 16571907424860,200166968890873,2447436683633895, 30343738969483443,381914993014556712, 4883614045607479339,63476602847240143719, 838919983940694715522] |