A001775 - cp's OEIS frontend

A001775 Numbers k such that 19*2^k - 1 is prime.

n	a(n)
1	1
2	3
3	5
4	21
5	41
6	49
7	89
8	133
9	141
10	165
11	189
12	293
13	305
14	395
15	651
16	665
17	771
18	801
19	923
20	953
21	3689
22	5315
23	6989
24	15641
25	48819
26	78389
27	134053
28	167843
29	181395
30	311091
31	353661
32	645555
33	916763

[1, 3, 5, 21, 41, 49, 89, 133, 141, 165, 189, 293, 305, 395, 651, 665, 771, 801, 923, 953, 3689, 5315, 6989, 15641, 48819, 78389, 134053, 167843, 181395, 311091, 353661, 645555, 916763]

cp's OEIS Frontend

A001775 Numbers k such that 19*2^k - 1 is prime.

Table of values

List of values