A110581 - cp's OEIS frontend

A110581 Primes p such that 2p-1 is prime, but 4p-3 is not prime.

n	a(n)
1	3
2	7
3	31
4	37
5	97
6	139
7	157
8	199
9	211
10	229
11	271
12	307
13	337
14	367
15	379
16	547
17	577
18	601
19	607
20	661
21	691
22	727
23	811
24	877
25	937
26	967
27	997
28	1009
29	1171
30	1237
31	1297
32	1399
33	1429
34	1459
35	1609
36	1627
37	1657
38	1759
39	1867
40	2011
41	2029
42	2137
43	2221
44	2281
45	2467
46	2539
47	2551
48	2557

[3, 7, 31, 37, 97, 139, 157, 199, 211, 229, 271, 307, 337, 367, 379, 547, 577, 601, 607, 661, 691, 727, 811, 877, 937, 967, 997, 1009, 1171, 1237, 1297, 1399, 1429, 1459, 1609, 1627, 1657, 1759, 1867, 2011, 2029, 2137, 2221, 2281, 2467, 2539, 2551, 2557]

cp's OEIS Frontend

A110581 Primes p such that 2p-1 is prime, but 4p-3 is not prime.

Table of values

List of values