A186645 - cp's OEIS frontend

A186645 Numbers k such that 2^(k-1) == 1 + b*k (mod k^2), where b divides k-1.

n	a(n)
1	3
2	7
3	11
4	13
5	19
6	29
7	31
8	37
9	71
10	127
11	379
12	491
13	2047
14	2633
15	2659
16	3373
17	8191
18	13249
19	26893
20	70687
21	74597
22	87211
23	131071
24	184511
25	524287
26	642581
27	1897121
28	2676301
29	2703739
30	8388607
31	15456151
32	52368101
33	102785339
34	126233057
35	193481677
36	536870911
37	856645921
38	1552107133
39	2001907169
40	2147483647
41	2935442621
42	3668158729
43	6004262437

[3, 7, 11, 13, 19, 29, 31, 37, 71, 127, 379, 491, 2047, 2633, 2659, 3373, 8191, 13249, 26893, 70687, 74597, 87211, 131071, 184511, 524287, 642581, 1897121, 2676301, 2703739, 8388607, 15456151, 52368101, 102785339, 126233057, 193481677, 536870911, 856645921, 1552107133, 2001907169, 2147483647, 2935442621, 3668158729, 6004262437]

cp's OEIS Frontend

A186645 Numbers k such that 2^(k-1) == 1 + b*k (mod k^2), where b divides k-1.

Table of values

List of values