A083545 - cp's OEIS frontend

A083545 Numbers k such that the geometric mean of the Euler totient function of k and k+1 is an integer.

n	a(n)
1	1
2	3
3	15
4	19
5	95
6	104
7	125
8	164
9	194
10	255
11	259
12	341
13	491
14	495
15	504
16	512
17	513
18	584
19	591
20	629
21	679
22	755
23	775
24	975
25	1024
26	1147
27	1247
28	1254
29	1260
30	1313
31	1358
32	1463
33	1469
34	1538
35	1615
36	1728
37	1919
38	1962
39	1970
40	2047
41	2071
42	2090
43	2204
44	2299
45	2321
46	2345
47	2404
48	2625

[1, 3, 15, 19, 95, 104, 125, 164, 194, 255, 259, 341, 491, 495, 504, 512, 513, 584, 591, 629, 679, 755, 775, 975, 1024, 1147, 1247, 1254, 1260, 1313, 1358, 1463, 1469, 1538, 1615, 1728, 1919, 1962, 1970, 2047, 2071, 2090, 2204, 2299, 2321, 2345, 2404, 2625]

cp's OEIS Frontend

A083545 Numbers k such that the geometric mean of the Euler totient function of k and k+1 is an integer.

Table of values

List of values