A167781 - cp's OEIS frontend

A167781 a(n) = smallest number b such that b+n is the first number after b with phi(phi(b)) = phi(phi(b+n)).

n	a(n)
1	1
2	4
3	45
4	14
5	58
6	25
7	68
8	17
9	183
10	41
11	27
12	85
13	274
14	101
15	875
16	38
17	184
18	53
19	478
20	196
21	848
22	807
23	23
24	173
25	615
26	125
27	271
28	303
29	189
30	351
31	405
32	191
33	1035
34	667
35	596
36	218
37	915
38	133
39	1525
40	397
41	376
42	92
43	1191
44	449
45	3466
46	552
47	47
48	346
49	404
50	137

[1, 4, 45, 14, 58, 25, 68, 17, 183, 41, 27, 85, 274, 101, 875, 38, 184, 53, 478, 196, 848, 807, 23, 173, 615, 125, 271, 303, 189, 351, 405, 191, 1035, 667, 596, 218, 915, 133, 1525, 397, 376, 92, 1191, 449, 3466, 552, 47, 346, 404, 137]

cp's OEIS Frontend

A167781 a(n) = smallest number b such that b+n is the first number after b with phi(phi(b)) = phi(phi(b+n)).

Table of values

List of values