The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 256 |
| 2 | 1776 |
| 3 | 1776 |
| 4 | 12712 |
| 5 | 11028 |
| 6 | 12712 |
| 7 | 91440 |
| 8 | 81864 |
| 9 | 81864 |
| 10 | 91440 |
| 11 | 656272 |
| 12 | 620988 |
| 13 | 754704 |
| 14 | 620988 |
| 15 | 656272 |
| 16 | 4711264 |
| 17 | 4601832 |
| 18 | 6705048 |
| 19 | 6705048 |
| 20 | 4601832 |
| 21 | 4711264 |
| 22 | 33827496 |
| 23 | 34647764 |
| 24 | 59081744 |
| 25 | 70027468 |
| 26 | 59081744 |
| 27 | 34647764 |
| 28 | 33827496 |
[256,1776,1776,12712,11028,12712,91440,81864, 81864,91440,656272,620988,754704,620988,656272, 4711264,4601832,6705048,6705048,4601832,4711264, 33827496,34647764,59081744,70027468,59081744, 34647764,33827496] |