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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1365 |
| 2 | 6531525 |
| 3 | 36155455908 |
| 4 | 212422672667205 |
| 5 | 1289347174337943240 |
| 6 | 7988578284829726217700 |
| 7 | 50202452144162092092126900 |
| 8 | 318773474802860214828983563845 |
| 9 | 2040213003374489097738224937634800 |
| 10 | 13139471029644309699515037254016803400 |
| 11 | 85049362365373576290876509860293890825640 |
[1,1365,6531525,36155455908,212422672667205, 1289347174337943240,7988578284829726217700, 50202452144162092092126900, 318773474802860214828983563845, 2040213003374489097738224937634800, 13139471029644309699515037254016803400, 85049362365373576290876509860293890825640] |