The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 42 |
| 2 | 1762 |
| 3 | 73836 |
| 4 | 3090540 |
| 5 | 129211992 |
| 6 | 5395998264 |
| 7 | 225081383184 |
| 8 | 9377874118032 |
| 9 | 390269410826400 |
| 10 | 16222513520584224 |
| 11 | 673540179648009408 |
| 12 | 27931792247763542208 |
| 13 | 1156970310094516546944 |
| 14 | 47866526425527842874240 |
[1,42,1762,73836,3090540,129211992,5395998264, 225081383184,9377874118032,390269410826400, 16222513520584224,673540179648009408, 27931792247763542208,1156970310094516546944, 47866526425527842874240] |