A072989 - cp's OEIS frontend

A072989 Numbers m>0 such that the number of solutions to x^m==1 (mod m), 1<=x<=m, is not equal to gcd(m, phi(m)).

n	a(n)
1	20
2	30
3	40
4	42
5	52
6	60
7	66
8	68
9	70
10	78
11	80
12	84
13	90
14	100
15	102
16	104
17	110
18	114
19	116
20	120
21	126
22	130
23	132
24	136
25	138
26	140
27	148
28	150
29	154
30	156
31	160
32	164
33	168
34	170
35	171
36	174
37	180
38	182
39	186
40	190
41	198
42	200
43	204
44	208
45	210
46	212
47	220
48	222
49	228
50	230
51	232
52	234
53	238
54	240

[20, 30, 40, 42, 52, 60, 66, 68, 70, 78, 80, 84, 90, 100, 102, 104, 110, 114, 116, 120, 126, 130, 132, 136, 138, 140, 148, 150, 154, 156, 160, 164, 168, 170, 171, 174, 180, 182, 186, 190, 198, 200, 204, 208, 210, 212, 220, 222, 228, 230, 232, 234, 238, 240]

cp's OEIS Frontend

A072989 Numbers m>0 such that the number of solutions to x^m==1 (mod m), 1<=x<=m, is not equal to gcd(m, phi(m)).

Table of values

List of values

n	a(n)
1	20
2	30
3	40
4	42
5	52
6	60
7	66
8	68
9	70
10	78
11	80
12	84
13	90
14	100
15	102
16	104
17	110
18	114
19	116
20	120
21	126
22	130
23	132
24	136
25	138
26	140
27	148
28	150
29	154
30	156
31	160
32	164
33	168
34	170
35	171
36	174
37	180
38	182
39	186
40	190
41	198
42	200
43	204
44	208
45	210
46	212
47	220
48	222
49	228
50	230
51	232
52	234
53	238
54	240

n	a(n)
1	20
2	30
3	40
4	42
5	52
6	60
7	66
8	68
9	70
10	78
11	80
12	84
13	90
14	100
15	102
16	104
17	110
18	114
19	116
20	120
21	126
22	130
23	132
24	136
25	138
26	140
27	148
28	150
29	154
30	156
31	160
32	164
33	168
34	170
35	171
36	174
37	180
38	182
39	186
40	190
41	198
42	200
43	204
44	208
45	210
46	212
47	220
48	222
49	228
50	230
51	232
52	234
53	238
54	240

n	a(n)
1	20
2	30
3	40
4	42
5	52
6	60
7	66
8	68
9	70
10	78
11	80
12	84
13	90
14	100
15	102
16	104
17	110
18	114
19	116
20	120
21	126
22	130
23	132
24	136
25	138
26	140
27	148
28	150
29	154
30	156
31	160
32	164
33	168
34	170
35	171
36	174
37	180
38	182
39	186
40	190
41	198
42	200
43	204
44	208
45	210
46	212
47	220
48	222
49	228
50	230
51	232
52	234
53	238
54	240