| n | a(n) |
|---|---|
| 1 | 31 |
| 2 | 3552 |
| 3 | 2214457 |
| 4 | 7635071835 |
| 5 | 144396520117972 |
| 6 | 15033760617564577257 |
| 7 | 8603578492435516321649249 |
| 8 | 27081302315719663051228636805358 |
[31,3552,2214457,7635071835,144396520117972, 15033760617564577257,8603578492435516321649249, 27081302315719663051228636805358] |