n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 0 |
3 | 0 |
4 | 1 |
5 | 4 |
6 | 10 |
7 | 20 |
8 | 39 |
9 | 88 |
10 | 228 |
11 | 600 |
12 | 1507 |
13 | 3652 |
14 | 8866 |
15 | 22100 |
16 | 56365 |
17 | 144656 |
18 | 369784 |
19 | 942480 |
20 | 2408934 |
21 | 6196280 |
22 | 16026652 |
23 | 41571640 |
24 | 107959654 |
25 | 280708560 |
26 | 731349400 |
27 | 1910098320 |
28 | 4999759830 |
29 | 13109582376 |
30 | 34421585844 |
31 | 90500370760 |
32 | 238272324682 |
[1,0,0,0,1,4,10,20,39,88,228,600,1507,3652,8866, 22100,56365,144656,369784,942480,2408934,6196280, 16026652,41571640,107959654,280708560,731349400, 1910098320,4999759830,13109582376,34421585844, 90500370760,238272324682] |