A264866 - cp's OEIS frontend

A264866 Primes of the form 2^x + y (x >= 0 and 0 <= y < 2^x) such that all the numbers 2^(x+a) + (y-a) (0 < a <= y) are composite.

n	a(n)
1	2
2	3
3	5
4	11
5	13
6	17
7	19
8	23
9	41
10	71
11	131
12	149
13	257
14	277
15	523
16	1117
17	2053
18	2161
19	2237
20	2251
21	2999
22	4099
23	5237
24	8233
25	8243
26	16453
27	16553
28	32771
29	32779
30	32783
31	32789
32	32797
33	32801
34	32839
35	32843
36	32917
37	33623
38	65537
39	65539
40	65543
41	65563
42	65599
43	65651
44	72497
45	131129
46	131267
47	134777
48	262147
49	262151
50	264959

[2, 3, 5, 11, 13, 17, 19, 23, 41, 71, 131, 149, 257, 277, 523, 1117, 2053, 2161, 2237, 2251, 2999, 4099, 5237, 8233, 8243, 16453, 16553, 32771, 32779, 32783, 32789, 32797, 32801, 32839, 32843, 32917, 33623, 65537, 65539, 65543, 65563, 65599, 65651, 72497, 131129, 131267, 134777, 262147, 262151, 264959]

cp's OEIS Frontend

A264866 Primes of the form 2^x + y (x >= 0 and 0 <= y < 2^x) such that all the numbers 2^(x+a) + (y-a) (0 < a <= y) are composite.

Table of values

List of values