A215904 - OEIS

A215904 as a simple table

n	a(n)
1	1
2	1
3	1
4	2
5	1
6	2
7	2
8	2
9	2
10	2
11	5
12	5
13	15
14	5
15	5
16	5
17	15
18	42
19	42
20	15
21	5
22	15
23	52
24	726
25	602
26	726
27	52
28	15
29	15
30	203
31	2906
32	12840
33	12840
34	2906
35	203
36	15
37	52
38	877
39	84550
40	373780
41	2387217
42	373780
43	84550
44	877
45	52
46	52
47	4140
48	433252
49	14050312
50	87852626
51	87852626
52	14050312
53	433252

[1,1,1,2,1,2,2,2,2,2,5,5,15,5,5,5,15,42,42,15,5, 15,52,726,602,726,52,15,15,203,2906,12840,12840, 2906,203,15,52,877,84550,373780,2387217,373780, 84550,877,52,52,4140,433252,14050312,87852626, 87852626,14050312,433252]