A067130 - cp's OEIS frontend

A067130 Numbers k such that sigma(k-1) divides sigma(k+1).

n	a(n)
1	2
2	34
3	55
4	119
5	285
6	367
7	835
8	849
9	919
10	1241
11	1505
12	1559
13	2911
14	2914
15	2939
16	3305
17	4149
18	4188
19	6111
20	6903
21	7170
22	7913
23	9360
24	10251
25	10541
26	12566
27	15086
28	17273
29	17759
30	17815
31	19005
32	19689
33	19919
34	21411
35	21462
36	24882
37	25020
38	26610
39	28125
40	30593
41	30789
42	31485

[2, 34, 55, 119, 285, 367, 835, 849, 919, 1241, 1505, 1559, 2911, 2914, 2939, 3305, 4149, 4188, 6111, 6903, 7170, 7913, 9360, 10251, 10541, 12566, 15086, 17273, 17759, 17815, 19005, 19689, 19919, 21411, 21462, 24882, 25020, 26610, 28125, 30593, 30789, 31485]

cp's OEIS Frontend

A067130 Numbers k such that sigma(k-1) divides sigma(k+1).

Table of values

List of values