A320580 - cp's OEIS frontend

A320580 Numbers k such that for any positive integers x,y coprime to k, x^x == y (mod k) iff y^y == x (mod k).

n	a(n)
1	1
2	2
3	4
4	6
5	8
6	12
7	16
8	18
9	20
10	24
11	32
12	36
13	40
14	42
15	48
16	60
17	72
18	80
19	84
20	96
21	120
22	126
23	144
24	156
25	160
26	168
27	180
28	240
29	252
30	288
31	312
32	336
33	360
34	420
35	468
36	480
37	504
38	624
39	672
40	720
41	780
42	840
43	936
44	1008
45	1092
46	1248
47	1260
48	1440
49	1560
50	1680
51	1872
52	2016
53	2184
54	2340
55	2520
56	3120
57	3276
58	3360
59	3744
60	4368
61	4680
62	5040
63	5460
64	6240
65	6552
66	8736
67	9360
68	10080
69	10920
70	13104
71	16380
72	18720
73	21840
74	26208
75	32760
76	43680
77	65520
78	131040

[1, 2, 4, 6, 8, 12, 16, 18, 20, 24, 32, 36, 40, 42, 48, 60, 72, 80, 84, 96, 120, 126, 144, 156, 160, 168, 180, 240, 252, 288, 312, 336, 360, 420, 468, 480, 504, 624, 672, 720, 780, 840, 936, 1008, 1092, 1248, 1260, 1440, 1560, 1680, 1872, 2016, 2184, 2340, 2520, 3120, 3276, 3360, 3744, 4368, 4680, 5040, 5460, 6240, 6552, 8736, 9360, 10080, 10920, 13104, 16380, 18720, 21840, 26208, 32760, 43680, 65520, 131040]

cp's OEIS Frontend

A320580 Numbers k such that for any positive integers x,y coprime to k, x^x == y (mod k) iff y^y == x (mod k).

Table of values

List of values