A236693 - cp's OEIS frontend

A236693 Numbers k such that 2^sigma(k) == 1 (mod k).

n	a(n)
1	1
2	3
3	15
4	35
5	51
6	65
7	105
8	119
9	195
10	255
11	315
12	323
13	357
14	377
15	455
16	459
17	585
18	595
19	663
20	969
21	1045
22	1071
23	1105
24	1131
25	1189
26	1365
27	1455
28	1469
29	1485
30	1547
31	1615
32	1785
33	1799
34	1885
35	1887
36	1911
37	2261
38	2295
39	2385
40	2639
41	2795
42	2907
43	3135
44	3145
45	3185
46	3213
47	3315
48	3339

[1, 3, 15, 35, 51, 65, 105, 119, 195, 255, 315, 323, 357, 377, 455, 459, 585, 595, 663, 969, 1045, 1071, 1105, 1131, 1189, 1365, 1455, 1469, 1485, 1547, 1615, 1785, 1799, 1885, 1887, 1911, 2261, 2295, 2385, 2639, 2795, 2907, 3135, 3145, 3185, 3213, 3315, 3339]

cp's OEIS Frontend

A236693 Numbers k such that 2^sigma(k) == 1 (mod k).

Table of values

List of values