n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 12 |
3 | 30 |
4 | 66 |
5 | 148 |
6 | 316 |
7 | 682 |
8 | 1438 |
9 | 3052 |
10 | 6428 |
11 | 13574 |
12 | 28594 |
13 | 60284 |
14 | 127004 |
15 | 267634 |
16 | 563870 |
17 | 1188084 |
18 | 2503180 |
19 | 5274062 |
20 | 11112002 |
21 | 23412164 |
22 | 49327516 |
23 | 103929178 |
24 | 218970366 |
25 | 461352988 |
26 | 972033500 |
27 | 2047996278 |
28 | 4314962930 |
29 | 9091278956 |
30 | 19154591420 |
31 | 40357179234 |
[1,4,12,30,66,148,316,682,1438,3052,6428,13574, 28594,60284,127004,267634,563870,1188084,2503180, 5274062,11112002,23412164,49327516,103929178, 218970366,461352988,972033500,2047996278, 4314962930,9091278956,19154591420,40357179234] |