n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 0 |
3 | 0 |
4 | 0 |
5 | 1 |
6 | 1 |
7 | 5 |
8 | 6 |
9 | 20 |
10 | 27 |
11 | 75 |
12 | 110 |
13 | 275 |
14 | 429 |
15 | 1001 |
16 | 1637 |
17 | 3639 |
18 | 6172 |
19 | 13243 |
20 | 23104 |
21 | 48280 |
22 | 86090 |
23 | 176341 |
24 | 319792 |
25 | 645150 |
26 | 1185305 |
27 | 2363596 |
28 | 4386331 |
29 | 8669142 |
30 | 16212913 |
31 | 31825005 |
32 | 59873834 |
33 | 116914020 |
34 | 220964744 |
35 | 429737220 |
36 | 815057639 |
[1,0,0,0,0,1,1,5,6,20,27,75,110,275,429,1001,1637, 3639,6172,13243,23104,48280,86090,176341,319792, 645150,1185305,2363596,4386331,8669142,16212913, 31825005,59873834,116914020,220964744,429737220, 815057639] |