The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 64 |
| 2 | 1740 |
| 3 | 25572 |
| 4 | 400428 |
| 5 | 5877228 |
| 6 | 84310620 |
| 7 | 1184381844 |
| 8 | 16385570076 |
| 9 | 223935582828 |
| 10 | 3030348558252 |
| 11 | 40673437553748 |
| 12 | 542180347359564 |
| 13 | 7185077761974828 |
| 14 | 94737850175764476 |
| 15 | 1243661129422894356 |
[64,1740,25572,400428,5877228,84310620,1184381844, 16385570076,223935582828,3030348558252, 40673437553748,542180347359564,7185077761974828, 94737850175764476,1243661129422894356] |