A283808 - cp's OEIS frontend

A283808 Numbers k such that phi(phi(k)) divides k, where phi(k) is A000010(k).

n	a(n)
1	1
2	2
3	3
4	4
5	6
6	8
7	10
8	12
9	14
10	16
11	18
12	20
13	24
14	28
15	32
16	36
17	40
18	48
19	54
20	56
21	64
22	72
23	80
24	96
25	108
26	112
27	128
28	144
29	160
30	162
31	192
32	216
33	224
34	256
35	288
36	320
37	324
38	384
39	432
40	448
41	486
42	512
43	576
44	640
45	648
46	768
47	864
48	896
49	972
50	1024
51	1152
52	1280
53	1296
54	1458
55	1536
56	1728
57	1792
58	1944
59	2048
60	2304
61	2560

[1, 2, 3, 4, 6, 8, 10, 12, 14, 16, 18, 20, 24, 28, 32, 36, 40, 48, 54, 56, 64, 72, 80, 96, 108, 112, 128, 144, 160, 162, 192, 216, 224, 256, 288, 320, 324, 384, 432, 448, 486, 512, 576, 640, 648, 768, 864, 896, 972, 1024, 1152, 1280, 1296, 1458, 1536, 1728, 1792, 1944, 2048, 2304, 2560]

cp's OEIS Frontend

A283808 Numbers k such that phi(phi(k)) divides k, where phi(k) is A000010(k).

Table of values

List of values