A066111 - cp's OEIS frontend

A066111 Prime powers m such that sigma_4(m^2)/sigma_2(m^2) is prime.

n	a(n)
1	2
2	3
3	5
4	13
5	17
6	31
7	43
8	61
9	83
10	109
11	121
12	125
13	131
14	229
15	239
16	257
17	263
18	269
19	311
20	313
21	343
22	361
23	443
24	463
25	503
26	571
27	593
28	599
29	619
30	641
31	647
32	653
33	659
34	701
35	797
36	811
37	853
38	953
39	967
40	1009
41	1031
42	1039
43	1063
44	1123
45	1373
46	1459
47	1483
48	1499
49	1663
50	1669
51	1693

[2, 3, 5, 13, 17, 31, 43, 61, 83, 109, 121, 125, 131, 229, 239, 257, 263, 269, 311, 313, 343, 361, 443, 463, 503, 571, 593, 599, 619, 641, 647, 653, 659, 701, 797, 811, 853, 953, 967, 1009, 1031, 1039, 1063, 1123, 1373, 1459, 1483, 1499, 1663, 1669, 1693]

cp's OEIS Frontend

A066111 Prime powers m such that sigma_4(m^2)/sigma_2(m^2) is prime.

Table of values

List of values