n | a(n) |
---|---|
1 | 1 |
2 | 4 |
3 | 11 |
4 | 55 |
5 | 261 |
6 | 1373 |
7 | 7377 |
8 | 41256 |
9 | 235639 |
10 | 1372782 |
11 | 8114465 |
12 | 48564722 |
13 | 293656843 |
14 | 1791382922 |
15 | 11011083783 |
16 | 68131049950 |
17 | 424018776003 |
[1,4,11,55,261,1373,7377,41256,235639,1372782, 8114465,48564722,293656843,1791382922,11011083783, 68131049950,424018776003] |