The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 22 |
| 4 | 292 |
| 5 | 6120 |
| 6 | 193594 |
| 7 | 9070536 |
| 8 | 622336756 |
| 9 | 61915861962 |
| 10 | 8846814822932 |
| 11 | 1798543906246948 |
| 12 | 515674104905890202 |
| 13 | 206833212761446463192 |
| 14 | 115198617558900993580396 |
| 15 | 88503974769306037986089170 |
| 16 | 93233054587165663487254293572 |
[1,3,22,292,6120,193594,9070536,622336756, 61915861962,8846814822932,1798543906246948, 515674104905890202,206833212761446463192, 115198617558900993580396, 88503974769306037986089170, 93233054587165663487254293572] |