n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 2 |
4 | 5 |
5 | 14 |
6 | 40 |
7 | 127 |
8 | 408 |
9 | 1364 |
10 | 4638 |
11 | 16079 |
12 | 56401 |
13 | 200169 |
14 | 716599 |
15 | 2585833 |
16 | 9392704 |
17 | 34319666 |
18 | 126046498 |
19 | 465076159 |
20 | 1723092407 |
21 | 6407856762 |
22 | 23910255143 |
23 | 89493903437 |
24 | 335912684824 |
25 | 1264106399919 |
26 | 4768447977465 |
27 | 18027218146451 |
[1,1,1,2,5,14,40,127,408,1364,4638,16079,56401, 200169,716599,2585833,9392704,34319666,126046498, 465076159,1723092407,6407856762,23910255143, 89493903437,335912684824,1264106399919, 4768447977465,18027218146451] |