A022166 - OEIS

A022166 as a simple table

n	a(n)
0	1
1	1
2	1
3	1
4	3
5	1
6	1
7	7
8	7
9	1
10	1
11	15
12	35
13	15
14	1
15	1
16	31
17	155
18	155
19	31
20	1
21	1
22	63
23	651
24	1395
25	651
26	63
27	1
28	1
29	127
30	2667
31	11811
32	11811
33	2667
34	127
35	1
36	1
37	255
38	10795
39	97155
40	200787
41	97155
42	10795
43	255
44	1
45	1
46	511
47	43435
48	788035
49	3309747
50	3309747
51	788035
52	43435
53	511
54	1

[1,1,1,1,3,1,1,7,7,1,1,15,35,15,1,1,31,155,155,31, 1,1,63,651,1395,651,63,1,1,127,2667,11811,11811, 2667,127,1,1,255,10795,97155,200787,97155,10795, 255,1,1,511,43435,788035,3309747,3309747,788035, 43435,511,1]