A078148 - cp's OEIS frontend

A078148 Numbers k such that d(phi(k)) = phi(d(k)), where d=A000005 and phi=A000010.

n	a(n)
1	1
2	2
3	4
4	6
5	16
6	24
7	30
8	36
9	64
10	384
11	408
12	480
13	510
14	1024
15	1296
16	1560
17	1680
18	2304
19	2640
20	3480
21	4096
22	5440
23	5520
24	6360
25	9240
26	11280
27	14040
28	14160
29	14400
30	15120
31	15960
32	17880
33	19320
34	19920
35	20760
36	22848
37	24480
38	25680
39	26880
40	30360
41	32280
42	35160

[1, 2, 4, 6, 16, 24, 30, 36, 64, 384, 408, 480, 510, 1024, 1296, 1560, 1680, 2304, 2640, 3480, 4096, 5440, 5520, 6360, 9240, 11280, 14040, 14160, 14400, 15120, 15960, 17880, 19320, 19920, 20760, 22848, 24480, 25680, 26880, 30360, 32280, 35160]

cp's OEIS Frontend

A078148 Numbers k such that d(phi(k)) = phi(d(k)), where d=A000005 and phi=A000010.

Table of values

List of values