n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 0 |
3 | 0 |
4 | 1 |
5 | 1 |
6 | 6 |
7 | 7 |
8 | 28 |
9 | 36 |
10 | 120 |
11 | 165 |
12 | 495 |
13 | 715 |
14 | 2002 |
15 | 3003 |
16 | 8008 |
17 | 12376 |
18 | 31824 |
19 | 50388 |
20 | 125970 |
21 | 203490 |
22 | 497420 |
23 | 817190 |
24 | 1961256 |
25 | 3268760 |
26 | 7726160 |
27 | 13037895 |
28 | 30421755 |
29 | 51895935 |
30 | 119759850 |
31 | 206253075 |
[0,0,0,0,1,1,6,7,28,36,120,165,495,715,2002,3003, 8008,12376,31824,50388,125970,203490,497420, 817190,1961256,3268760,7726160,13037895,30421755, 51895935,119759850,206253075] |