n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 4 |
4 | 10 |
5 | 55 |
6 | 616 |
7 | 34552 |
8 | 21319201 |
9 | 736642386706 |
10 | 15704627843968647814 |
11 | 11568694537326272321321120595205 |
12 | 181682042349262169758803442669575561298555791374890 |
[1,1,4,10,55,616,34552,21319201,736642386706, 15704627843968647814, 11568694537326272321321120595205, 18168204234926216975880344266957556129855579137489\ 0] |