A145903 - OEIS

A145903 as a simple table

n	a(n)
0	1
1	1
2	1
3	1
4	2
5	1
6	1
7	6
8	6
9	1
10	1
11	12
12	24
13	12
14	1
15	1
16	20
17	70
18	70
19	20
20	1
21	1
22	30
23	165
24	280
25	165
26	30
27	1
28	1
29	42
30	336
31	875
32	875
33	336
34	42
35	1
36	1
37	56
38	616
39	2296
40	3500
41	2296
42	616
43	56
44	1
45	1
46	72
47	1044
48	5292
49	11466
50	11466
51	5292
52	1044
53	72
54	1

[1,1,1,1,2,1,1,6,6,1,1,12,24,12,1,1,20,70,70,20,1, 1,30,165,280,165,30,1,1,42,336,875,875,336,42,1,1, 56,616,2296,3500,2296,616,56,1,1,72,1044,5292, 11466,11466,5292,1044,72,1]