A168287 - OEIS

A168287 as a simple table

n	a(n)
0	1
1	1
2	1
3	1
4	4
5	1
6	1
7	11
8	11
9	1
10	1
11	26
12	60
13	26
14	1
15	1
16	57
17	252
18	252
19	57
20	1
21	1
22	120
23	931
24	1746
25	931
26	120
27	1
28	1
29	247
30	3201
31	10187
32	10187
33	3201
34	247
35	1
36	1
37	502
38	10534
39	53542
40	89788
41	53542
42	10534
43	502
44	1
45	1
46	1013
47	33698
48	262466
49	688976
50	688976
51	262466
52	33698
53	1013

[1,1,1,1,4,1,1,11,11,1,1,26,60,26,1,1,57,252,252, 57,1,1,120,931,1746,931,120,1,1,247,3201,10187, 10187,3201,247,1,1,502,10534,53542,89788,53542, 10534,502,1,1,1013,33698,262466,688976,688976, 262466,33698,1013]