The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 8 |
| 3 | 217 |
| 4 | 13896 |
| 5 | 1737217 |
| 6 | 375252768 |
| 7 | 128713436641 |
| 8 | 65901654812960 |
| 9 | 48042435072084481 |
| 10 | 48042500973739293960 |
| 11 | 63944616838482072345241 |
| 12 | 110496345939397994751870408 |
| 13 | 242760535973474232951931631617 |
| 14 | 666135021207559234618095149027456 |
[0,1,8,217,13896,1737217,375252768,128713436641, 65901654812960,48042435072084481, 48042500973739293960,63944616838482072345241, 110496345939397994751870408, 242760535973474232951931631617, 666135021207559234618095149027456] |