n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 0 |
4 | 0 |
5 | 0 |
6 | 0 |
7 | 0 |
8 | 0 |
9 | 1 |
10 | 1 |
11 | 5 |
12 | 19 |
13 | 55 |
14 | 143 |
15 | 334 |
16 | 715 |
17 | 1430 |
18 | 2702 |
19 | 4862 |
20 | 8398 |
21 | 13997 |
22 | 22610 |
23 | 35530 |
24 | 54480 |
25 | 81719 |
26 | 120175 |
27 | 173587 |
28 | 246675 |
29 | 345345 |
30 | 476905 |
31 | 650325 |
32 | 876525 |
33 | 1168700 |
34 | 1542684 |
35 | 2017356 |
36 | 2615092 |
37 | 3362260 |
38 | 4289780 |
39 | 5433722 |
[0,0,0,0,0,0,0,0,1,1,5,19,55,143,334,715,1430, 2702,4862,8398,13997,22610,35530,54480,81719, 120175,173587,246675,345345,476905,650325,876525, 1168700,1542684,2017356,2615092,3362260,4289780, 5433722] |