n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 0 |
3 | 1 |
4 | 3 |
5 | 8 |
6 | 20 |
7 | 49 |
8 | 119 |
9 | 291 |
10 | 715 |
11 | 1768 |
12 | 4396 |
13 | 10983 |
14 | 27551 |
15 | 69351 |
16 | 175081 |
17 | 443119 |
18 | 1123963 |
19 | 2856383 |
20 | 7271377 |
21 | 18538391 |
22 | 47327615 |
23 | 120972510 |
24 | 309555666 |
25 | 792917565 |
26 | 2032905981 |
27 | 5216436109 |
28 | 13395813003 |
29 | 34425270629 |
30 | 88527064337 |
[0,0,0,1,3,8,20,49,119,291,715,1768,4396,10983, 27551,69351,175081,443119,1123963,2856383,7271377, 18538391,47327615,120972510,309555666,792917565, 2032905981,5216436109,13395813003,34425270629, 88527064337] |