n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 4 |
4 | 10 |
5 | 26 |
6 | 64 |
7 | 163 |
8 | 416 |
9 | 1067 |
10 | 2755 |
11 | 7147 |
12 | 18613 |
13 | 48638 |
14 | 127463 |
15 | 334864 |
16 | 881657 |
17 | 2325750 |
18 | 6145596 |
19 | 16263866 |
20 | 43099804 |
21 | 114356611 |
22 | 303761260 |
23 | 807692034 |
24 | 2149632061 |
25 | 5726042115 |
26 | 15264691107 |
27 | 40722913454 |
28 | 108713644516 |
[1,1,2,4,10,26,64,163,416,1067,2755,7147,18613, 48638,127463,334864,881657,2325750,6145596, 16263866,43099804,114356611,303761260,807692034, 2149632061,5726042115,15264691107,40722913454, 108713644516] |