A134876 - cp's OEIS frontend

A134876 Number of Proth primes: number of primes of the form 1 + k*2^n with k odd and k < 2^n.

n	a(n)
1	1
2	2
3	1
4	3
5	4
6	8
7	18
8	23
9	44
10	73
11	142
12	277
13	484
14	871
15	1644
16	3060
17	5851
18	10917
19	20776
20	39263
21	74752
22	142521
23	271223
24	520242
25	996486
26	1916486
27	3686628
28	7103236
29	13702428
30	26469008
31	51193351
32	99099882
33	192044541
34	372559804
35	723389144

[1, 2, 1, 3, 4, 8, 18, 23, 44, 73, 142, 277, 484, 871, 1644, 3060, 5851, 10917, 20776, 39263, 74752, 142521, 271223, 520242, 996486, 1916486, 3686628, 7103236, 13702428, 26469008, 51193351, 99099882, 192044541, 372559804, 723389144]

cp's OEIS Frontend

A134876 Number of Proth primes: number of primes of the form 1 + k*2^n with k odd and k < 2^n.

Table of values

List of values