n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 7 |
3 | 31 |
4 | 154 |
5 | 820 |
6 | 4575 |
7 | 26398 |
8 | 156233 |
9 | 943174 |
10 | 5785416 |
11 | 35955297 |
12 | 225914342 |
13 | 1432705496 |
14 | 9158708775 |
15 | 58954911423 |
16 | 381806076426 |
17 | 2485972170888 |
18 | 16263884777805 |
19 | 106858957537838 |
20 | 704810376478024 |
21 | 4664987368511948 |
22 | 30974829705533240 |
23 | 206266525653071416 |
[1,2,7,31,154,820,4575,26398,156233,943174, 5785416,35955297,225914342,1432705496,9158708775, 58954911423,381806076426,2485972170888, 16263884777805,106858957537838,704810376478024, 4664987368511948,30974829705533240, 206266525653071416] |