The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 42 |
| 3 | 6006 |
| 4 | 204204 |
| 5 | 3879876 |
| 6 | 446185740 |
| 7 | 38818159380 |
| 8 | 2406725881560 |
| 9 | 89048857617720 |
| 10 | 3651003162326520 |
| 11 | 156993135980040360 |
| 12 | 51650741737433278440 |
| 13 | 2737489312083963757320 |
| 14 | 2737489312083963757320 |
[1,42,6006,204204,3879876,446185740,38818159380, 2406725881560,89048857617720,3651003162326520, 156993135980040360,51650741737433278440, 2737489312083963757320,2737489312083963757320] |