A239712 - OEIS

A239712 as a simple table

n	a(n)
1	2
2	5
3	11
4	17
5	19
6	23
7	47
8	67
9	71
10	79
11	131
12	191
13	257
14	263
15	271
16	383
17	1031
18	1039
19	1087
20	1151
21	1279
22	2063
23	2111
24	4099
25	4111
26	4127
27	4159
28	5119
29	6143
30	8447
31	16447
32	20479
33	32771
34	32783
35	32831
36	33023
37	33791
38	65537
39	65539
40	65543
41	65551
42	65599
43	66047
44	73727
45	81919
46	262147
47	262151
48	262271
49	262399
50	263167

[2,5,11,17,19,23,47,67,71,79,131,191,257,263,271, 383,1031,1039,1087,1151,1279,2063,2111,4099,4111, 4127,4159,5119,6143,8447,16447,20479,32771,32783, 32831,33023,33791,65537,65539,65543,65551,65599, 66047,73727,81919,262147,262151,262271,262399, 263167]