The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 6 |
| 3 | 65 |
| 4 | 1737 |
| 5 | 91359 |
| 6 | 8755730 |
| 7 | 1465091787 |
| 8 | 420070484342 |
| 9 | 194857695312573 |
| 10 | 142349343815684947 |
| 11 | 161388097061567486595 |
| 12 | 276760372468557882285737 |
| 13 | 707850058213409589011565269 |
| 14 | 2654427644322345709705054800083 |
[1,1,6,65,1737,91359,8755730,1465091787, 420070484342,194857695312573,142349343815684947, 161388097061567486595,276760372468557882285737, 707850058213409589011565269, 2654427644322345709705054800083] |