n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 1 |
3 | 4 |
4 | 7 |
5 | 12 |
6 | 30 |
7 | 68 |
8 | 137 |
9 | 292 |
10 | 644 |
11 | 1380 |
12 | 2936 |
13 | 6324 |
14 | 13625 |
15 | 29216 |
16 | 62701 |
17 | 134784 |
18 | 289547 |
19 | 621708 |
20 | 1335378 |
21 | 2868620 |
22 | 6161329 |
23 | 13233352 |
24 | 28424456 |
25 | 61053608 |
26 | 131135696 |
27 | 281665480 |
28 | 604991601 |
29 | 1299461088 |
30 | 2791106585 |
31 | 5995016764 |
32 | 12876698159 |
33 | 27657841516 |
[1,0,1,4,7,12,30,68,137,292,644,1380,2936,6324, 13625,29216,62701,134784,289547,621708,1335378, 2868620,6161329,13233352,28424456,61053608, 131135696,281665480,604991601,1299461088, 2791106585,5995016764,12876698159,27657841516] |