A066961 - cp's OEIS frontend

A066961 Numbers k such that sigma(k) divides sigma(sigma(k)).

n	a(n)
1	1
2	5
3	12
4	54
5	56
6	87
7	95
8	276
9	308
10	427
11	429
12	446
13	455
14	501
15	581
16	611
17	9120
18	9180
19	9504
20	9720
21	9960
22	10296
23	10620
24	10740
25	10824
26	11070
27	11310
28	11480
29	11484
30	11556
31	11628
32	11748
33	11934
34	11960
35	12024
36	12036
37	12072
38	12084
39	12376
40	12460
41	12510
42	12570

[1, 5, 12, 54, 56, 87, 95, 276, 308, 427, 429, 446, 455, 501, 581, 611, 9120, 9180, 9504, 9720, 9960, 10296, 10620, 10740, 10824, 11070, 11310, 11480, 11484, 11556, 11628, 11748, 11934, 11960, 12024, 12036, 12072, 12084, 12376, 12460, 12510, 12570]

cp's OEIS Frontend

A066961 Numbers k such that sigma(k) divides sigma(sigma(k)).

Table of values

List of values