n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 6 |
4 | 23 |
5 | 116 |
6 | 736 |
7 | 5659 |
8 | 50796 |
9 | 521040 |
10 | 6006587 |
11 | 76874524 |
12 | 1081439062 |
13 | 16586149365 |
14 | 275442822510 |
15 | 4924040788654 |
[1,2,6,23,116,736,5659,50796,521040,6006587, 76874524,1081439062,16586149365,275442822510, 4924040788654] |