A385245 - cp's OEIS frontend

A385245 Primes that are no longer prime if in their binary representation any single bit is flipped but stay prime if a 1 bit is prepended.

n	a(n)
1	223
2	257
3	509
4	787
5	853
6	877
7	1259
8	1451
9	1973
10	2917
11	3511
12	5099
13	6287
14	6521
15	7841
16	8171
17	8923
18	9319
19	10567
20	11353
21	12517
22	12637
23	12763
24	13687
25	14107
26	14629
27	15217
28	15607
29	16943
30	17519
31	18089
32	18593
33	18743
34	19139
35	20183
36	20393
37	20639
38	21701
39	22943
40	26591
41	26891

[223, 257, 509, 787, 853, 877, 1259, 1451, 1973, 2917, 3511, 5099, 6287, 6521, 7841, 8171, 8923, 9319, 10567, 11353, 12517, 12637, 12763, 13687, 14107, 14629, 15217, 15607, 16943, 17519, 18089, 18593, 18743, 19139, 20183, 20393, 20639, 21701, 22943, 26591, 26891]

cp's OEIS Frontend

A385245 Primes that are no longer prime if in their binary representation any single bit is flipped but stay prime if a 1 bit is prepended.

Table of values

List of values