n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 0 |
4 | 0 |
5 | 0 |
6 | 0 |
7 | 0 |
8 | 1 |
9 | 1 |
10 | 5 |
11 | 15 |
12 | 42 |
13 | 99 |
14 | 215 |
15 | 429 |
16 | 805 |
17 | 1430 |
18 | 2431 |
19 | 3978 |
20 | 6299 |
21 | 9690 |
22 | 14535 |
23 | 21318 |
24 | 30645 |
25 | 43263 |
26 | 60088 |
27 | 82225 |
28 | 111004 |
29 | 148005 |
30 | 195098 |
31 | 254475 |
32 | 328697 |
33 | 420732 |
34 | 534006 |
35 | 672452 |
36 | 840565 |
37 | 1043460 |
38 | 1286934 |
39 | 1577532 |
40 | 1922618 |
[0,0,0,0,0,0,0,1,1,5,15,42,99,215,429,805,1430, 2431,3978,6299,9690,14535,21318,30645,43263,60088, 82225,111004,148005,195098,254475,328697,420732, 534006,672452,840565,1043460,1286934,1577532, 1922618] |