A038871 - OEIS

A038871 as a simple table

n	a(n)
1	0
2	1
3	1
4	3
5	1
6	5
7	7
8	1
9	5
10	11
11	15
12	1
13	9
14	21
15	27
16	31
17	1
18	9
19	21
20	43
21	55
22	63
23	1
24	17
25	37
26	85
27	91
28	119
29	127
30	1
31	17
32	73
33	85
34	171
35	219
36	239
37	255
38	1
39	33
40	73
41	165
42	341
43	363
44	439
45	495
46	511
47	1
48	33
49	137
50	293
51	341
52	683
53	731
54	887
55	991
56	1023
57	1
58	65
59	273
60	585
61	661
62	1365
63	1387

[0,1,1,3,1,5,7,1,5,11,15,1,9,21,27,31,1,9,21,43, 55,63,1,17,37,85,91,119,127,1,17,73,85,171,219, 239,255,1,33,73,165,341,363,439,495,511,1,33,137, 293,341,683,731,887,991,1023,1,65,273,585,661, 1365,1387]