n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 1 |
3 | 2 |
4 | 4 |
5 | 9 |
6 | 18 |
7 | 42 |
8 | 96 |
9 | 229 |
10 | 549 |
11 | 1347 |
12 | 3326 |
13 | 8330 |
14 | 21000 |
15 | 53407 |
16 | 136639 |
17 | 351757 |
18 | 909962 |
19 | 2365146 |
20 | 6172068 |
21 | 16166991 |
22 | 42488077 |
23 | 112004630 |
24 | 296080425 |
25 | 784688263 |
26 | 2084521232 |
27 | 5549613097 |
28 | 14804572332 |
29 | 39568107511 |
30 | 105938822149 |
[0,1,1,2,4,9,18,42,96,229,549,1347,3326,8330, 21000,53407,136639,351757,909962,2365146,6172068, 16166991,42488077,112004630,296080425,784688263, 2084521232,5549613097,14804572332,39568107511, 105938822149] |