The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 25 |
| 2 | 426 |
| 3 | 6170 |
| 4 | 81851 |
| 5 | 1029315 |
| 6 | 12498676 |
| 7 | 148149460 |
| 8 | 1726010901 |
| 9 | 19855374605 |
| 10 | 226242178526 |
| 11 | 2559210312750 |
| 12 | 28786474721551 |
| 13 | 322368894171895 |
| 14 | 3597522989519976 |
| 15 | 40035969784960040 |
| 16 | 444564772324613801 |
[1,25,426,6170,81851,1029315,12498676,148149460, 1726010901,19855374605,226242178526,2559210312750, 28786474721551,322368894171895,3597522989519976, 40035969784960040,444564772324613801] |