n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 8 |
3 | 26 |
4 | 73 |
5 | 210 |
6 | 558 |
7 | 1460 |
8 | 3663 |
9 | 9090 |
10 | 21846 |
11 | 51690 |
12 | 120140 |
13 | 274480 |
14 | 618656 |
15 | 1374792 |
16 | 3017867 |
17 | 6546610 |
18 | 14053312 |
19 | 29852658 |
20 | 62825894 |
21 | 131025056 |
22 | 270948160 |
23 | 555811298 |
24 | 1131498850 |
25 | 2286780266 |
26 | 4589706604 |
27 | 9151298134 |
28 | 18131193484 |
29 | 35706460678 |
30 | 69910352496 |
[1,2,8,26,73,210,558,1460,3663,9090,21846,51690, 120140,274480,618656,1374792,3017867,6546610, 14053312,29852658,62825894,131025056,270948160, 555811298,1131498850,2286780266,4589706604, 9151298134,18131193484,35706460678,69910352496] |