n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 4 |
4 | 11 |
5 | 31 |
6 | 96 |
7 | 305 |
8 | 1007 |
9 | 3389 |
10 | 11636 |
11 | 40498 |
12 | 142714 |
13 | 507870 |
14 | 1823040 |
15 | 6591885 |
16 | 23989419 |
17 | 87795473 |
18 | 322922652 |
19 | 1193058230 |
20 | 4425547638 |
21 | 16475756738 |
22 | 61539293424 |
23 | 230548633954 |
24 | 866095934598 |
25 | 3261868457698 |
26 | 12313423931624 |
[1,1,2,4,11,31,96,305,1007,3389,11636,40498, 142714,507870,1823040,6591885,23989419,87795473, 322922652,1193058230,4425547638,16475756738, 61539293424,230548633954,866095934598, 3261868457698,12313423931624] |