A127936 - cp's OEIS frontend

A127936 Numbers k such that 1 + Sum_{i=1..k} 2^(2*i-1) is prime.

n	a(n)
1	1
2	2
3	3
4	5
5	6
6	8
7	9
8	11
9	15
10	21
11	30
12	39
13	50
14	63
15	83
16	95
17	99
18	156
19	173
20	350
21	854
22	1308
23	1769
24	2903
25	5250
26	5345
27	5639
28	6195
29	7239
30	21368
31	41669
32	47684
33	58619
34	63515
35	69468
36	70539
37	133508
38	134993
39	187160
40	493095

[1, 2, 3, 5, 6, 8, 9, 11, 15, 21, 30, 39, 50, 63, 83, 95, 99, 156, 173, 350, 854, 1308, 1769, 2903, 5250, 5345, 5639, 6195, 7239, 21368, 41669, 47684, 58619, 63515, 69468, 70539, 133508, 134993, 187160, 493095]

cp's OEIS Frontend

A127936 Numbers k such that 1 + Sum_{i=1..k} 2^(2*i-1) is prime.

Table of values

List of values