n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 4 |
3 | 11 |
4 | 40 |
5 | 146 |
6 | 556 |
7 | 2193 |
8 | 8782 |
9 | 35996 |
10 | 149102 |
11 | 626514 |
12 | 2657002 |
13 | 11364796 |
14 | 49005900 |
15 | 212539829 |
16 | 927754782 |
17 | 4068514036 |
18 | 17928721394 |
19 | 79325129056 |
20 | 352268070718 |
21 | 1569846519622 |
22 | 7016512277212 |
23 | 31453931008870 |
24 | 141356729372092 |
25 | 636840991055262 |
26 | 2875436365711636 |
27 | 13009869271150484 |
[1,1,4,11,40,146,556,2193,8782,35996,149102, 626514,2657002,11364796,49005900,212539829, 927754782,4068514036,17928721394,79325129056, 352268070718,1569846519622,7016512277212, 31453931008870,141356729372092,636840991055262, 2875436365711636,13009869271150484] |