A001263 - OEIS

A001263 as a simple table

n	a(n)
1	1
2	1
3	1
4	1
5	3
6	1
7	1
8	6
9	6
10	1
11	1
12	10
13	20
14	10
15	1
16	1
17	15
18	50
19	50
20	15
21	1
22	1
23	21
24	105
25	175
26	105
27	21
28	1
29	1
30	28
31	196
32	490
33	490
34	196
35	28
36	1
37	1
38	36
39	336
40	1176
41	1764
42	1176
43	336
44	36
45	1
46	1
47	45
48	540
49	2520
50	5292
51	5292
52	2520
53	540
54	45
55	1
56	1
57	55
58	825
59	4950
60	13860
61	19404
62	13860
63	4950
64	825

[1,1,1,1,3,1,1,6,6,1,1,10,20,10,1,1,15,50,50,15,1, 1,21,105,175,105,21,1,1,28,196,490,490,196,28,1,1, 36,336,1176,1764,1176,336,36,1,1,45,540,2520,5292, 5292,2520,540,45,1,1,55,825,4950,13860,19404, 13860,4950,825]

[1,1,1,1,3,1,1,6,6,1,1,10,20,10,1,1,15,50,50,15,1,
 1,21,105,175,105,21,1,1,28,196,490,490,196,28,1,1,
 36,336,1176,1764,1176,336,36,1,1,45,540,2520,5292,
 5292,2520,540,45,1,1,55,825,4950,13860,19404,
 13860,4950,825]