n | a(n) |
---|---|
4 | 1 |
5 | 0 |
6 | 5 |
7 | 5 |
8 | 21 |
9 | 40 |
10 | 100 |
11 | 210 |
12 | 396 |
13 | 870 |
14 | 1790 |
15 | 3510 |
16 | 6681 |
17 | 13100 |
18 | 25320 |
19 | 47835 |
20 | 87126 |
21 | 166195 |
22 | 299375 |
23 | 542595 |
24 | 991036 |
25 | 1775935 |
26 | 3145270 |
27 | 5487805 |
28 | 9852046 |
29 | 17092310 |
30 | 29561070 |
31 | 50696690 |
32 | 88015196 |
33 | 150446590 |
34 | 256066280 |
35 | 428469220 |
36 | 727919426 |
37 | 1224816005 |
38 | 2043828145 |
[1,0,5,5,21,40,100,210,396,870,1790,3510,6681, 13100,25320,47835,87126,166195,299375,542595, 991036,1775935,3145270,5487805,9852046,17092310, 29561070,50696690,88015196,150446590,256066280, 428469220,727919426,1224816005,2043828145] |