The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 6 |
| 3 | 43 |
| 4 | 557 |
| 5 | 14432 |
| 6 | 719469 |
| 7 | 70372090 |
| 8 | 13351521479 |
| 9 | 4941545691252 |
| 10 | 3559349503024593 |
| 11 | 4993739972681894885 |
| 12 | 13642580224488264353504 |
| 13 | 72582736229683196932680697 |
| 14 | 751993955499337790653321567382 |
| 15 | 15172223086707160824288341875907978 |
[2,6,43,557,14432,719469,70372090,13351521479, 4941545691252,3559349503024593, 4993739972681894885,13642580224488264353504, 72582736229683196932680697, 751993955499337790653321567382, 15172223086707160824288341875907978] |