The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 65 |
| 3 | 20708 |
| 4 | 18383828 |
| 5 | 34898769936 |
| 6 | 121324513279512 |
| 7 | 697408243146701056 |
| 8 | 6165037130760825320768 |
| 9 | 79390334273383043609851520 |
| 10 | 1428007543233019703635181454080 |
| 11 | 34693490969752778534655707874499584 |
| 12 | 1107666867764009444258160579726602423808 |
[1,1,65,20708,18383828,34898769936, 121324513279512,697408243146701056, 6165037130760825320768,79390334273383043609851520, 1428007543233019703635181454080, 34693490969752778534655707874499584, 1107666867764009444258160579726602423808] |