The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 50 |
| 2 | 8250 |
| 3 | 1636250 |
| 4 | 349456250 |
| 5 | 77636318760 |
| 6 | 17672894531250 |
| 7 | 4089765214843750 |
| 8 | 957711284472656250 |
| 9 | 226280605806640625000 |
| 10 | 53837289804317953893960 |
| 11 | 12880759628253295898437500 |
[1,50,8250,1636250,349456250,77636318760, 17672894531250,4089765214843750, 957711284472656250,226280605806640625000, 53837289804317953893960, 12880759628253295898437500] |