n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 2 |
3 | 4 |
4 | 8 |
5 | 20 |
6 | 44 |
7 | 100 |
8 | 228 |
9 | 516 |
10 | 1172 |
11 | 2660 |
12 | 6036 |
13 | 13700 |
14 | 31092 |
15 | 70564 |
16 | 160148 |
17 | 363460 |
18 | 824884 |
19 | 1872100 |
20 | 4248788 |
21 | 9642756 |
22 | 21884532 |
23 | 49667620 |
24 | 112722196 |
25 | 255826500 |
26 | 580606132 |
27 | 1317703524 |
28 | 2990568788 |
29 | 6787188100 |
30 | 15403732724 |
31 | 34959246500 |
32 | 79341088148 |
33 | 180067046596 |
[1,0,2,4,8,20,44,100,228,516,1172,2660,6036,13700, 31092,70564,160148,363460,824884,1872100,4248788, 9642756,21884532,49667620,112722196,255826500, 580606132,1317703524,2990568788,6787188100, 15403732724,34959246500,79341088148,180067046596] |