A015840 - cp's OEIS frontend

A015840 Numbers k such that phi(k) | sigma(k + 3).

n	a(n)
1	1
2	2
3	3
4	4
5	7
6	8
7	12
8	14
9	19
10	20
11	21
12	24
13	27
14	30
15	32
16	39
17	52
18	63
19	84
20	91
21	102
22	112
23	117
24	127
25	129
26	132
27	135
28	155
29	165
30	181
31	200
32	210
33	252
34	327
35	348
36	387
37	403
38	405
39	410
40	432
41	452
42	453
43	456
44	459
45	475
46	480
47	532
48	549
49	592
50	620
51	624
52	679
53	693
54	714
55	725
56	952
57	1009

[1, 2, 3, 4, 7, 8, 12, 14, 19, 20, 21, 24, 27, 30, 32, 39, 52, 63, 84, 91, 102, 112, 117, 127, 129, 132, 135, 155, 165, 181, 200, 210, 252, 327, 348, 387, 403, 405, 410, 432, 452, 453, 456, 459, 475, 480, 532, 549, 592, 620, 624, 679, 693, 714, 725, 952, 1009]

cp's OEIS Frontend

A015840 Numbers k such that phi(k) | sigma(k + 3).

Table of values

List of values