n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 1 |
3 | 2 |
4 | 8 |
5 | 25 |
6 | 83 |
7 | 282 |
8 | 971 |
9 | 3386 |
10 | 11940 |
11 | 42504 |
12 | 152546 |
13 | 551426 |
14 | 2005930 |
15 | 7337901 |
16 | 26976726 |
17 | 99618976 |
18 | 369349607 |
19 | 1374391706 |
20 | 5131186060 |
21 | 19214759396 |
22 | 72152791729 |
23 | 271629133830 |
24 | 1024989876797 |
25 | 3876208984221 |
26 | 14688301498888 |
27 | 55763768987236 |
28 | 212077310097784 |
[1,0,1,2,8,25,83,282,971,3386,11940,42504,152546, 551426,2005930,7337901,26976726,99618976, 369349607,1374391706,5131186060,19214759396, 72152791729,271629133830,1024989876797, 3876208984221,14688301498888,55763768987236, 212077310097784] |