The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 8 |
| 2 | 17 |
| 3 | 126 |
| 4 | 378 |
| 5 | 7604 |
| 6 | 38022 |
| 7 | 2075945 |
| 8 | 14531618 |
| 9 | 2156683401 |
| 10 | 23723517421 |
| 11 | 9570750010878 |
| 12 | 124419750141419 |
| 13 | 136442823568464604 |
| 14 | 2319528000663898268 |
| 15 | 6914415519745978746410 |
| 16 | 131373894875173596181802 |
[1,8,17,126,378,7604,38022,2075945,14531618, 2156683401,23723517421,9570750010878, 124419750141419,136442823568464604, 2319528000663898268,6914415519745978746410, 131373894875173596181802] |