n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 3 |
4 | 7 |
5 | 22 |
6 | 65 |
7 | 212 |
8 | 697 |
9 | 2372 |
10 | 8179 |
11 | 28703 |
12 | 101851 |
13 | 365393 |
14 | 1322034 |
15 | 4820378 |
16 | 17691018 |
17 | 65306700 |
18 | 242317423 |
19 | 903242615 |
20 | 3380707920 |
21 | 12700575742 |
22 | 47874113728 |
23 | 181013422393 |
24 | 686341240781 |
25 | 2609093456212 |
26 | 9941953711409 |
[1,1,1,3,7,22,65,212,697,2372,8179,28703,101851, 365393,1322034,4820378,17691018,65306700, 242317423,903242615,3380707920,12700575742, 47874113728,181013422393,686341240781, 2609093456212,9941953711409] |