A065916 - OEIS

A065916 as a simple table

n	a(n)
1	7
2	31
3	7
4	127
5	7
6	31
7	7
8	511
9	7
10	31
11	7
12	127
13	7
14	31
15	7
16	2047
17	7
18	31
19	7
20	127
21	7
22	31
23	7
24	511
25	7
26	31
27	7
28	127
29	7
30	31
31	7
32	8191
33	7
34	31
35	7
36	127
37	7
38	31
39	7
40	511
41	7
42	31
43	7
44	127
45	7
46	31
47	7
48	2047
49	7
50	31
51	7
52	127
53	7
54	31
55	7
56	511
57	7
58	31
59	7
60	127
61	7
62	31
63	7
64	32767
65	7
66	31
67	7
68	127
69	7
70	31
71	7
72	511
73	7

[7,31,7,127,7,31,7,511,7,31,7,127,7,31,7,2047,7, 31,7,127,7,31,7,511,7,31,7,127,7,31,7,8191,7,31,7, 127,7,31,7,511,7,31,7,127,7,31,7,2047,7,31,7,127, 7,31,7,511,7,31,7,127,7,31,7,32767,7,31,7,127,7, 31,7,511,7]