The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 17 |
| 3 | 19684 |
| 4 | 4294967313 |
| 5 | 298023223876953126 |
| 6 | 10314424798490535546171968756 |
| 7 | 256923577521058878088611477224235621321608 |
| 8 | 6277101735386680763835789423207666416102355444468329480209 |
[1,17,19684,4294967313,298023223876953126, 10314424798490535546171968756, 256923577521058878088611477224235621321608, 62771017353866807638357894232076664161023554444683\ 29480209] |