A070160 - cp's OEIS frontend

A070160 Nonprime numbers k such that phi(k)/(sigma(k) - k - 1) is an integer.

n	a(n)
1	4
2	9
3	15
4	25
5	35
6	49
7	95
8	119
9	121
10	143
11	169
12	209
13	287
14	289
15	319
16	323
17	361
18	377
19	527
20	529
21	559
22	779
23	841
24	899
25	903
26	923
27	961
28	989
29	1007
30	1189
31	1199
32	1343
33	1349
34	1369
35	1681
36	1763
37	1849
38	1919
39	2159
40	2209
41	2507
42	2759
43	2809
44	2911
45	3239
46	3481
47	3599
48	3721

[4, 9, 15, 25, 35, 49, 95, 119, 121, 143, 169, 209, 287, 289, 319, 323, 361, 377, 527, 529, 559, 779, 841, 899, 903, 923, 961, 989, 1007, 1189, 1199, 1343, 1349, 1369, 1681, 1763, 1849, 1919, 2159, 2209, 2507, 2759, 2809, 2911, 3239, 3481, 3599, 3721]

cp's OEIS Frontend

A070160 Nonprime numbers k such that phi(k)/(sigma(k) - k - 1) is an integer.

Table of values

List of values