n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 0 |
4 | 0 |
5 | 2 |
6 | 8 |
7 | 20 |
8 | 41 |
9 | 63 |
10 | 126 |
11 | 252 |
12 | 505 |
13 | 1000 |
14 | 1936 |
15 | 3652 |
16 | 7305 |
17 | 14313 |
18 | 27573 |
19 | 52325 |
20 | 97868 |
21 | 180404 |
22 | 327692 |
23 | 586568 |
24 | 1034930 |
25 | 2718254 |
26 | 5012504 |
27 | 9131804 |
28 | 16440929 |
29 | 29259404 |
30 | 51482510 |
31 | 89575460 |
32 | 154146135 |
33 | 262403715 |
34 | 441956955 |
[0,0,0,0,2,8,20,41,63,126,252,505,1000,1936,3652, 7305,14313,27573,52325,97868,180404,327692,586568, 1034930,2718254,5012504,9131804,16440929,29259404, 51482510,89575460,154146135,262403715,441956955] |