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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 0 |
| 3 | 0 |
| 4 | 735471 |
| 5 | 41749257038001257014137504 |
| 6 | 8072776113194557737391130747136885454937928869204466648295480 |
| 7 | 34145180671088019813488798475366394184193477615213303683031012996650190080826664983024305988320017979711374101114480000 |
[1,0,0,735471,41749257038001257014137504, 80727761131945577373911307471368854549379288692044\ 66648295480, 34145180671088019813488798475366394184193477615213\ 30368303101299665019008082666498302430598832001797\ 9711374101114480000] |