A374841 - cp's OEIS frontend

A374841 Numbers k such that 2^(2^k-2) == 1 (mod k^2).

n	a(n)
1	3
2	7
3	19
4	43
5	73
6	127
7	163
8	337
9	341
10	379
11	487
12	601
13	881
14	883
15	937
16	1387
17	1459
18	1801
19	2593
20	2647
21	2857
22	3079
23	3529
24	3673
25	3943
26	4057
27	4201
28	4681
29	5419
30	5461
31	5881
32	6121
33	6481
34	6529
35	6553
36	6571
37	6841
38	7481
39	7993
40	8233
41	8911
42	9001
43	9199
44	9241
45	9721
46	10261
47	10657
48	11161
49	11827
50	12241

[3, 7, 19, 43, 73, 127, 163, 337, 341, 379, 487, 601, 881, 883, 937, 1387, 1459, 1801, 2593, 2647, 2857, 3079, 3529, 3673, 3943, 4057, 4201, 4681, 5419, 5461, 5881, 6121, 6481, 6529, 6553, 6571, 6841, 7481, 7993, 8233, 8911, 9001, 9199, 9241, 9721, 10261, 10657, 11161, 11827, 12241]

cp's OEIS Frontend

A374841 Numbers k such that 2^(2^k-2) == 1 (mod k^2).

Table of values

List of values