A091997 - cp's OEIS frontend

A091997 Numbers n such that 3*2^(n-1) - 1 is prime.

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	7
7	8
8	12
9	19
10	35
11	39
12	44
13	56
14	65
15	77
16	95
17	104
18	144
19	207
20	217
21	307
22	325
23	392
24	459
25	471
26	828
27	1275
28	3277
29	4205
30	5135
31	7560
32	12677
33	14899
34	18124
35	18820
36	25691
37	26460
38	41629
39	51388
40	71784
41	80331
42	85688
43	88172
44	97064
45	123631
46	155931
47	164988
48	234761
49	414841

[1, 2, 3, 4, 5, 7, 8, 12, 19, 35, 39, 44, 56, 65, 77, 95, 104, 144, 207, 217, 307, 325, 392, 459, 471, 828, 1275, 3277, 4205, 5135, 7560, 12677, 14899, 18124, 18820, 25691, 26460, 41629, 51388, 71784, 80331, 85688, 88172, 97064, 123631, 155931, 164988, 234761, 414841]

cp's OEIS Frontend

A091997 Numbers n such that 3*2^(n-1) - 1 is prime.

Table of values

List of values