n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 6 |
3 | 15 |
4 | 48 |
5 | 108 |
6 | 323 |
7 | 716 |
8 | 1868 |
9 | 4217 |
10 | 10137 |
11 | 22311 |
12 | 51477 |
13 | 110817 |
14 | 245260 |
15 | 519918 |
16 | 1114914 |
17 | 2318557 |
18 | 4854952 |
19 | 9923533 |
20 | 20335761 |
21 | 40941170 |
22 | 82365742 |
23 | 163413699 |
24 | 323589060 |
25 | 633429923 |
26 | 1236392498 |
27 | 2390718266 |
28 | 4606489839 |
29 | 8805346615 |
30 | 16768968317 |
31 | 31713677061 |
32 | 59747953446 |
[1,1,6,15,48,108,323,716,1868,4217,10137,22311, 51477,110817,245260,519918,1114914,2318557, 4854952,9923533,20335761,40941170,82365742, 163413699,323589060,633429923,1236392498, 2390718266,4606489839,8805346615,16768968317, 31713677061,59747953446] |