n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 4 |
3 | 6 |
4 | 23 |
5 | 52 |
6 | 194 |
7 | 586 |
8 | 2131 |
9 | 7286 |
10 | 26524 |
11 | 95326 |
12 | 350738 |
13 | 1290556 |
14 | 4798174 |
15 | 17895736 |
16 | 67127315 |
17 | 252645136 |
18 | 954510114 |
19 | 3616814566 |
20 | 13744183772 |
21 | 52357696956 |
22 | 199912348954 |
23 | 764877654106 |
24 | 2932035552786 |
25 | 11258999068468 |
26 | 43303860638644 |
27 | 166799986203766 |
[0,1,4,6,23,52,194,586,2131,7286,26524,95326, 350738,1290556,4798174,17895736,67127315, 252645136,954510114,3616814566,13744183772, 52357696956,199912348954,764877654106, 2932035552786,11258999068468,43303860638644, 166799986203766] |