A000978 - cp's OEIS frontend

A000978 Wagstaff numbers: numbers k such that (2^k + 1)/3 is prime.

n	a(n)
1	3
2	5
3	7
4	11
5	13
6	17
7	19
8	23
9	31
10	43
11	61
12	79
13	101
14	127
15	167
16	191
17	199
18	313
19	347
20	701
21	1709
22	2617
23	3539
24	5807
25	10501
26	10691
27	11279
28	12391
29	14479
30	42737
31	83339
32	95369
33	117239
34	127031
35	138937
36	141079
37	267017
38	269987
39	374321
40	986191
41	4031399

[3, 5, 7, 11, 13, 17, 19, 23, 31, 43, 61, 79, 101, 127, 167, 191, 199, 313, 347, 701, 1709, 2617, 3539, 5807, 10501, 10691, 11279, 12391, 14479, 42737, 83339, 95369, 117239, 127031, 138937, 141079, 267017, 269987, 374321, 986191, 4031399]

cp's OEIS Frontend

A000978 Wagstaff numbers: numbers k such that (2^k + 1)/3 is prime.

Table of values

List of values