A001770 - cp's OEIS frontend

A001770 Numbers k such that 5*2^k - 1 is prime.

n	a(n)
1	2
2	4
3	8
4	10
5	12
6	14
7	18
8	32
9	48
10	54
11	72
12	148
13	184
14	248
15	270
16	274
17	420
18	1340
19	1438
20	1522
21	1638
22	1754
23	1884
24	2014
25	2170
26	2548
27	2622
28	2652
29	2704
30	13510
31	21738
32	25624
33	41934
34	51478
35	52540
36	53230
37	172300
38	245728
39	350028
40	1194164

[2, 4, 8, 10, 12, 14, 18, 32, 48, 54, 72, 148, 184, 248, 270, 274, 420, 1340, 1438, 1522, 1638, 1754, 1884, 2014, 2170, 2548, 2622, 2652, 2704, 13510, 21738, 25624, 41934, 51478, 52540, 53230, 172300, 245728, 350028, 1194164]

cp's OEIS Frontend

A001770 Numbers k such that 5*2^k - 1 is prime.

Table of values

List of values