n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 1 |
3 | 2 |
4 | 7 |
5 | 26 |
6 | 117 |
7 | 594 |
8 | 3407 |
9 | 21682 |
10 | 151853 |
11 | 1160026 |
12 | 9600567 |
13 | 85566378 |
14 | 817099909 |
15 | 8322907298 |
16 | 90074979487 |
17 | 1032183177314 |
18 | 12485056392285 |
19 | 158964674218410 |
20 | 2125201153260167 |
21 | 29764791617545690 |
22 | 435823661971532981 |
23 | 6658895050949717362 |
24 | 105979606291488794607 |
[0,0,1,2,7,26,117,594,3407,21682,151853,1160026, 9600567,85566378,817099909,8322907298,90074979487, 1032183177314,12485056392285,158964674218410, 2125201153260167,29764791617545690, 435823661971532981,6658895050949717362, 105979606291488794607] |