n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 5 |
3 | 25 |
4 | 60 |
5 | 110 |
6 | 126 |
7 | 110 |
8 | 60 |
9 | 25 |
10 | 5 |
11 | 1 |
12 | 1 |
13 | 5 |
14 | 55 |
15 | 285 |
16 | 1245 |
17 | 3876 |
18 | 9780 |
19 | 19380 |
20 | 31650 |
21 | 41990 |
22 | 46378 |
23 | 41990 |
24 | 31650 |
25 | 19380 |
26 | 9780 |
27 | 3876 |
28 | 1245 |
29 | 285 |
30 | 55 |
31 | 5 |
32 | 1 |
33 | 1 |
34 | 10 |
35 | 130 |
36 | 1070 |
37 | 7080 |
38 | 36102 |
39 | 149785 |
40 | 511260 |
41 | 1468215 |
42 | 3584050 |
43 | 7523956 |
44 | 13672690 |
45 | 21646530 |
46 | 29964990 |
47 | 36386895 |
48 | 38808456 |
49 | 36386895 |
50 | 29964990 |
[1,1,5,25,60,110,126,110,60,25,5,1,1,5,55,285, 1245,3876,9780,19380,31650,41990,46378,41990, 31650,19380,9780,3876,1245,285,55,5,1,1,10,130, 1070,7080,36102,149785,511260,1468215,3584050, 7523956,13672690,21646530,29964990,36386895, 38808456,36386895,29964990] |