A083542 - cp's OEIS frontend

A083542 a(n) = phi(n+1)*phi(n), product of totients of two consecutive integers.

n	a(n)
1	1
2	2
3	4
4	8
5	8
6	12
7	24
8	24
9	24
10	40
11	40
12	48
13	72
14	48
15	64
16	128
17	96
18	108
19	144
20	96
21	120
22	220
23	176
24	160
25	240
26	216
27	216
28	336
29	224
30	240
31	480
32	320
33	320
34	384
35	288
36	432
37	648
38	432
39	384
40	640
41	480
42	504
43	840
44	480
45	528
46	1012
47	736
48	672
49	840
50	640
51	768
52	1248
53	936
54	720
55	960
56	864
57	1008

[1, 2, 4, 8, 8, 12, 24, 24, 24, 40, 40, 48, 72, 48, 64, 128, 96, 108, 144, 96, 120, 220, 176, 160, 240, 216, 216, 336, 224, 240, 480, 320, 320, 384, 288, 432, 648, 432, 384, 640, 480, 504, 840, 480, 528, 1012, 736, 672, 840, 640, 768, 1248, 936, 720, 960, 864, 1008]

cp's OEIS Frontend

A083542 a(n) = phi(n+1)*phi(n), product of totients of two consecutive integers.

Table of values

List of values