The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 16 |
| 2 | 512 |
| 3 | 14400 |
| 4 | 297920 |
| 5 | 7001316 |
| 6 | 163887724 |
| 7 | 3798503424 |
| 8 | 88222777344 |
| 9 | 2044040513284 |
| 10 | 47341085896775 |
| 11 | 1096581934350825 |
| 12 | 25398950018267007 |
| 13 | 588299914903045444 |
| 14 | 13626292315183613964 |
| 15 | 315613062527522527296 |
[16,512,14400,297920,7001316,163887724,3798503424, 88222777344,2044040513284,47341085896775, 1096581934350825,25398950018267007, 588299914903045444,13626292315183613964, 315613062527522527296] |