A260961 - cp's OEIS frontend

A260961 Numbers n such that phi(n') = phi(n)', where phi(n) is the Euler totient function of n and n' is the arithmetic derivative of n.

n	a(n)
1	1
2	3
3	8
4	28
5	32
6	36
7	40
8	50
9	56
10	80
11	128
12	176
13	184
14	228
15	324
16	368
17	448
18	472
19	504
20	560
21	576
22	664
23	704
24	1328
25	1336
26	1512
27	1620
28	1686
29	1816
30	2048
31	2544
32	2580
33	2864
34	3008
35	3064
36	3540
37	3776
38	3832
39	3888
40	4024
41	5184
42	5744
43	6048
44	6904
45	7096
46	7128
47	8192
48	9216
49	10264
50	10456

[1, 3, 8, 28, 32, 36, 40, 50, 56, 80, 128, 176, 184, 228, 324, 368, 448, 472, 504, 560, 576, 664, 704, 1328, 1336, 1512, 1620, 1686, 1816, 2048, 2544, 2580, 2864, 3008, 3064, 3540, 3776, 3832, 3888, 4024, 5184, 5744, 6048, 6904, 7096, 7128, 8192, 9216, 10264, 10456]

cp's OEIS Frontend

A260961 Numbers n such that phi(n') = phi(n)', where phi(n) is the Euler totient function of n and n' is the arithmetic derivative of n.

Table of values

List of values