A339268 - cp's OEIS frontend

A339268 The smallest prime that becomes 2 * prime(n), when all the bits in its binary expansion are inverted, or -1 if no such prime exists.

n	a(n)
1	11
2	549755813881
3	53
4	17
5	41
6	37
7	16349
8	89
9	977
10	197
11	193
12	181
13	173
14	937
15	929
16	149
17	137
18	389
19	1913
20	881
21	877
22	353
23	857
24	3917
25	317
26	821
27	3889
28	809
29	293
30	797
31	257
32	761
33	3821
34	65257
35	3797
36	3793
37	709
38	1721
39	3761
40	677
41	1048217
42	661
43	641
44	3709
45	3701
46	3697
47	601
48	577

[11, 549755813881, 53, 17, 41, 37, 16349, 89, 977, 197, 193, 181, 173, 937, 929, 149, 137, 389, 1913, 881, 877, 353, 857, 3917, 317, 821, 3889, 809, 293, 797, 257, 761, 3821, 65257, 3797, 3793, 709, 1721, 3761, 677, 1048217, 661, 641, 3709, 3701, 3697, 601, 577]

cp's OEIS Frontend

A339268 The smallest prime that becomes 2 * prime(n), when all the bits in its binary expansion are inverted, or -1 if no such prime exists.

Table of values

List of values