A176817 - cp's OEIS frontend

A176817 Nonprimes k such that 2^(k-1) == 4^(k-1) (mod k).

n	a(n)
1	1
2	4
3	8
4	16
5	28
6	32
7	64
8	112
9	128
10	256
11	341
12	448
13	496
14	512
15	561
16	645
17	1016
18	1024
19	1105
20	1288
21	1387
22	1729
23	1792
24	1905
25	2044
26	2047
27	2048
28	2416
29	2465
30	2701
31	2821
32	3277
33	4033
34	4096
35	4369
36	4371
37	4672
38	4681
39	4984
40	5461
41	6601
42	7168
43	7936
44	7957
45	8128
46	8192
47	8321
48	8481
49	8911

[1, 4, 8, 16, 28, 32, 64, 112, 128, 256, 341, 448, 496, 512, 561, 645, 1016, 1024, 1105, 1288, 1387, 1729, 1792, 1905, 2044, 2047, 2048, 2416, 2465, 2701, 2821, 3277, 4033, 4096, 4369, 4371, 4672, 4681, 4984, 5461, 6601, 7168, 7936, 7957, 8128, 8192, 8321, 8481, 8911]

cp's OEIS Frontend

A176817 Nonprimes k such that 2^(k-1) == 4^(k-1) (mod k).

Table of values

List of values