The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 6 |
| 3 | 78 |
| 4 | 2052 |
| 5 | 106488 |
| 6 | 10771434 |
| 7 | 2110085532 |
| 8 | 797446347192 |
| 9 | 579943875020256 |
| 10 | 810217005148827936 |
| 11 | 2171732709752890892010 |
| 12 | 11158300810941107526534798 |
| 13 | 109816641995164952307022930896 |
| 14 | 2069071339726973812974860505491442 |
[1,6,78,2052,106488,10771434,2110085532, 797446347192,579943875020256,810217005148827936, 2171732709752890892010,11158300810941107526534798, 109816641995164952307022930896, 2069071339726973812974860505491442] |