A273801 - cp's OEIS frontend

A273801 Numbers n for which n = (x - phi(x)) * (y - phi(y)), where n = x + y and x - phi(x) is the Euler cototient function of x.

n	a(n)
1	16
2	24
3	32
4	48
5	56
6	72
7	80
8	96
9	120
10	128
11	152
12	168
13	176
14	192
15	216
16	240
17	248
18	272
19	288
20	296
21	320
22	336
23	360
24	392
25	408
26	416
27	432
28	440
29	456
30	512
31	528
32	552
33	560
34	600
35	608
36	632
37	656
38	672
39	696
40	720
41	728
42	768
43	776
44	792
45	800
46	848
47	896
48	912
49	920
50	936
51	960
52	968
53	1008
54	1032

[16, 24, 32, 48, 56, 72, 80, 96, 120, 128, 152, 168, 176, 192, 216, 240, 248, 272, 288, 296, 320, 336, 360, 392, 408, 416, 432, 440, 456, 512, 528, 552, 560, 600, 608, 632, 656, 672, 696, 720, 728, 768, 776, 792, 800, 848, 896, 912, 920, 936, 960, 968, 1008, 1032]

cp's OEIS Frontend

A273801 Numbers n for which n = (x - phi(x)) * (y - phi(y)), where n = x + y and x - phi(x) is the Euler cototient function of x.

Table of values

List of values