n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 7 |
3 | 28 |
4 | 125 |
5 | 546 |
6 | 2527 |
7 | 11096 |
8 | 43633 |
9 | 186130 |
10 | 809831 |
11 | 3423432 |
12 | 14022373 |
13 | 58574894 |
14 | 250708291 |
15 | 1038612976 |
16 | 4353755777 |
17 | 18333324162 |
18 | 74663736859 |
19 | 311293807040 |
20 | 1286700247561 |
21 | 4917768055222 |
22 | 20458840039199 |
23 | 83985256000824 |
[1,2,7,28,125,546,2527,11096,43633,186130,809831, 3423432,14022373,58574894,250708291,1038612976, 4353755777,18333324162,74663736859,311293807040, 1286700247561,4917768055222,20458840039199, 83985256000824] |