The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 256 |
| 2 | 2228 |
| 3 | 2228 |
| 4 | 19856 |
| 5 | 30916 |
| 6 | 19856 |
| 7 | 171436 |
| 8 | 404844 |
| 9 | 404844 |
| 10 | 171436 |
| 11 | 1503360 |
| 12 | 5217808 |
| 13 | 8124056 |
| 14 | 5217808 |
| 15 | 1503360 |
| 16 | 13078180 |
| 17 | 67922876 |
| 18 | 142835932 |
| 19 | 142835932 |
| 20 | 67922876 |
| 21 | 13078180 |
| 22 | 114229184 |
| 23 | 889064156 |
| 24 | 2727955642 |
| 25 | 4018409892 |
| 26 | 2727955642 |
[256,2228,2228,19856,30916,19856,171436,404844, 404844,171436,1503360,5217808,8124056,5217808, 1503360,13078180,67922876,142835932,142835932, 67922876,13078180,114229184,889064156,2727955642, 4018409892,2727955642] |