A066930 - cp's OEIS frontend

A066930 Numbers k such that phi(sigma(k)) divides sigma(phi(k)).

n	a(n)
1	1
2	7
3	9
4	29
5	71
6	97
7	109
8	121
9	139
10	142
11	175
12	183
13	194
14	215
15	225
16	242
17	244
18	261
19	278
20	311
21	344
22	349
23	355
24	430
25	497
26	509
27	516
28	533
29	556
30	571
31	605
32	622
33	631
34	647
35	673
36	709
37	729
38	791
39	817
40	859
41	911
42	923
43	1021
44	1066
45	1112
46	1119
47	1142
48	1207
49	1243
50	1262
51	1277

[1, 7, 9, 29, 71, 97, 109, 121, 139, 142, 175, 183, 194, 215, 225, 242, 244, 261, 278, 311, 344, 349, 355, 430, 497, 509, 516, 533, 556, 571, 605, 622, 631, 647, 673, 709, 729, 791, 817, 859, 911, 923, 1021, 1066, 1112, 1119, 1142, 1207, 1243, 1262, 1277]

cp's OEIS Frontend

A066930 Numbers k such that phi(sigma(k)) divides sigma(phi(k)).

Table of values

List of values