n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 0 |
3 | 1 |
4 | 1 |
5 | 5 |
6 | 6 |
7 | 21 |
8 | 28 |
9 | 84 |
10 | 120 |
11 | 330 |
12 | 495 |
13 | 1287 |
14 | 2002 |
15 | 5005 |
16 | 8008 |
17 | 19448 |
18 | 31824 |
19 | 75582 |
20 | 125970 |
21 | 293930 |
22 | 497420 |
23 | 1144066 |
24 | 1961256 |
25 | 4457400 |
26 | 7726160 |
27 | 17383860 |
28 | 30421755 |
29 | 67863915 |
30 | 119759850 |
31 | 265182525 |
[0,0,0,1,1,5,6,21,28,84,120,330,495,1287,2002, 5005,8008,19448,31824,75582,125970,293930,497420, 1144066,1961256,4457400,7726160,17383860,30421755, 67863915,119759850,265182525] |