A055744 - cp's OEIS frontend

A055744 Numbers k such that k and phi(k) have the same prime factors.

n	a(n)
1	1
2	4
3	8
4	16
5	18
6	32
7	36
8	50
9	54
10	64
11	72
12	100
13	108
14	128
15	144
16	162
17	200
18	216
19	250
20	256
21	288
22	294
23	324
24	400
25	432
26	450
27	486
28	500
29	512
30	576
31	578
32	588
33	648
34	800
35	864
36	882
37	900
38	972
39	1000
40	1014
41	1024
42	1152
43	1156
44	1176
45	1210
46	1250
47	1296
48	1350
49	1458
50	1600
51	1728
52	1764

[1, 4, 8, 16, 18, 32, 36, 50, 54, 64, 72, 100, 108, 128, 144, 162, 200, 216, 250, 256, 288, 294, 324, 400, 432, 450, 486, 500, 512, 576, 578, 588, 648, 800, 864, 882, 900, 972, 1000, 1014, 1024, 1152, 1156, 1176, 1210, 1250, 1296, 1350, 1458, 1600, 1728, 1764]

cp's OEIS Frontend

A055744 Numbers k such that k and phi(k) have the same prime factors.

Table of values

List of values