A152215 - cp's OEIS frontend

A152215 Numbers k such that sigma_2(k)/(sigma_1(k)*sigma_0(k)) = c, c an integer.

n	a(n)
1	1
2	4
3	25
4	100
5	121
6	256
7	289
8	484
9	529
10	841
11	1156
12	1600
13	1681
14	2116
15	2209
16	2809
17	3025
18	3364
19	3481
20	5041
21	6400
22	6724
23	6889
24	7225
25	7921
26	8836
27	10201
28	11236
29	11449
30	12100
31	12769
32	13225
33	13924
34	17161
35	18225
36	18496
37	18769
38	20164
39	21025
40	22201
41	27556
42	27889
43	28900

[1, 4, 25, 100, 121, 256, 289, 484, 529, 841, 1156, 1600, 1681, 2116, 2209, 2809, 3025, 3364, 3481, 5041, 6400, 6724, 6889, 7225, 7921, 8836, 10201, 11236, 11449, 12100, 12769, 13225, 13924, 17161, 18225, 18496, 18769, 20164, 21025, 22201, 27556, 27889, 28900]

cp's OEIS Frontend

A152215 Numbers k such that sigma_2(k)/(sigma_1(k)*sigma_0(k)) = c, c an integer.

Table of values

List of values