n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 6 |
3 | 19 |
4 | 64 |
5 | 231 |
6 | 870 |
7 | 3381 |
8 | 13486 |
9 | 54572 |
10 | 224125 |
11 | 933929 |
12 | 3936544 |
13 | 16765384 |
14 | 71980646 |
15 | 311017381 |
16 | 1352436222 |
17 | 5916084672 |
18 | 26018810746 |
19 | 114980517626 |
20 | 510144652268 |
21 | 2271483627590 |
22 | 10149077070927 |
23 | 45495648807256 |
24 | 204569352272940 |
25 | 922360752757352 |
26 | 4168790748795270 |
27 | 18884057836684121 |
[1,2,6,19,64,231,870,3381,13486,54572,224125, 933929,3936544,16765384,71980646,311017381, 1352436222,5916084672,26018810746,114980517626, 510144652268,2271483627590,10149077070927, 45495648807256,204569352272940,922360752757352, 4168790748795270,18884057836684121] |