A291855 - cp's OEIS frontend

A291855 Numbers k such that gpf(2^k - 1) - 1 is not divisible by k.

n	a(n)
1	28
2	52
3	68
4	92
5	124
6	156
7	172
8	244
9	260
10	308
11	327
12	340
13	348
14	356
15	380
16	396
17	404
18	428
19	436
20	500
21	508
22	516
23	532
24	580
25	612
26	644
27	660
28	684
29	696
30	724
31	732
32	748
33	764
34	780
35	796
36	820
37	836
38	908
39	940
40	980
41	996
42	1056
43	1076
44	1124
45	1172
46	1180

[28, 52, 68, 92, 124, 156, 172, 244, 260, 308, 327, 340, 348, 356, 380, 396, 404, 428, 436, 500, 508, 516, 532, 580, 612, 644, 660, 684, 696, 724, 732, 748, 764, 780, 796, 820, 836, 908, 940, 980, 996, 1056, 1076, 1124, 1172, 1180]

cp's OEIS Frontend

A291855 Numbers k such that gpf(2^k - 1) - 1 is not divisible by k.

Table of values

List of values