A300080 - cp's OEIS frontend

A300080 Numbers k that are not prime powers, and have exactly phi(phi(k)) residues modulo k of the maximum order.

n	a(n)
1	6
2	10
3	14
4	15
5	18
6	20
7	22
8	26
9	30
10	34
11	35
12	38
13	39
14	40
15	45
16	46
17	48
18	50
19	51
20	52
21	54
22	55
23	58
24	60
25	62
26	68
27	70
28	74
29	75
30	78
31	82
32	85
33	86
34	87
35	90
36	94
37	95
38	96
39	98
40	100
41	102
42	104
43	105
44	106
45	110
46	111
47	112
48	115
49	116
50	118
51	119
52	120
53	122
54	123
55	134
56	135
57	136
58	140
59	142
60	143
61	144
62	146
63	148
64	150
65	153
66	155
67	156
68	158
69	159
70	160
71	162
72	164
73	165
74	166

[6, 10, 14, 15, 18, 20, 22, 26, 30, 34, 35, 38, 39, 40, 45, 46, 48, 50, 51, 52, 54, 55, 58, 60, 62, 68, 70, 74, 75, 78, 82, 85, 86, 87, 90, 94, 95, 96, 98, 100, 102, 104, 105, 106, 110, 111, 112, 115, 116, 118, 119, 120, 122, 123, 134, 135, 136, 140, 142, 143, 144, 146, 148, 150, 153, 155, 156, 158, 159, 160, 162, 164, 165, 166]

cp's OEIS Frontend

A300080 Numbers k that are not prime powers, and have exactly phi(phi(k)) residues modulo k of the maximum order.

Table of values

List of values

n	a(n)
1	6
2	10
3	14
4	15
5	18
6	20
7	22
8	26
9	30
10	34
11	35
12	38
13	39
14	40
15	45
16	46
17	48
18	50
19	51
20	52
21	54
22	55
23	58
24	60
25	62
26	68
27	70
28	74
29	75
30	78
31	82
32	85
33	86
34	87
35	90
36	94
37	95
38	96
39	98
40	100
41	102
42	104
43	105
44	106
45	110
46	111
47	112
48	115
49	116
50	118
51	119
52	120
53	122
54	123
55	134
56	135
57	136
58	140
59	142
60	143
61	144
62	146
63	148
64	150
65	153
66	155
67	156
68	158
69	159
70	160
71	162
72	164
73	165
74	166

n	a(n)
1	6
2	10
3	14
4	15
5	18
6	20
7	22
8	26
9	30
10	34
11	35
12	38
13	39
14	40
15	45
16	46
17	48
18	50
19	51
20	52
21	54
22	55
23	58
24	60
25	62
26	68
27	70
28	74
29	75
30	78
31	82
32	85
33	86
34	87
35	90
36	94
37	95
38	96
39	98
40	100
41	102
42	104
43	105
44	106
45	110
46	111
47	112
48	115
49	116
50	118
51	119
52	120
53	122
54	123
55	134
56	135
57	136
58	140
59	142
60	143
61	144
62	146
63	148
64	150
65	153
66	155
67	156
68	158
69	159
70	160
71	162
72	164
73	165
74	166

n	a(n)
1	6
2	10
3	14
4	15
5	18
6	20
7	22
8	26
9	30
10	34
11	35
12	38
13	39
14	40
15	45
16	46
17	48
18	50
19	51
20	52
21	54
22	55
23	58
24	60
25	62
26	68
27	70
28	74
29	75
30	78
31	82
32	85
33	86
34	87
35	90
36	94
37	95
38	96
39	98
40	100
41	102
42	104
43	105
44	106
45	110
46	111
47	112
48	115
49	116
50	118
51	119
52	120
53	122
54	123
55	134
56	135
57	136
58	140
59	142
60	143
61	144
62	146
63	148
64	150
65	153
66	155
67	156
68	158
69	159
70	160
71	162
72	164
73	165
74	166