A272592 - cp's OEIS frontend

A272592 Numbers n such that the multiplicative group modulo n is the direct product of 2 cyclic groups.

n	a(n)
1	8
2	12
3	15
4	16
5	20
6	21
7	28
8	30
9	32
10	33
11	35
12	36
13	39
14	42
15	44
16	45
17	51
18	52
19	55
20	57
21	63
22	64
23	65
24	66
25	68
26	69
27	70
28	75
29	76
30	77
31	78
32	85
33	87
34	90
35	91
36	92
37	93
38	95
39	99
40	100
41	102
42	108
43	110
44	111
45	114
46	115
47	116
48	117
49	119
50	123
51	124
52	126
53	128
54	129
55	130
56	133
57	135
58	138
59	141
60	143
61	145
62	147
63	148
64	150
65	153
66	154
67	155
68	159
69	161

[8, 12, 15, 16, 20, 21, 28, 30, 32, 33, 35, 36, 39, 42, 44, 45, 51, 52, 55, 57, 63, 64, 65, 66, 68, 69, 70, 75, 76, 77, 78, 85, 87, 90, 91, 92, 93, 95, 99, 100, 102, 108, 110, 111, 114, 115, 116, 117, 119, 123, 124, 126, 128, 129, 130, 133, 135, 138, 141, 143, 145, 147, 148, 150, 153, 154, 155, 159, 161]

cp's OEIS Frontend

A272592 Numbers n such that the multiplicative group modulo n is the direct product of 2 cyclic groups.

Table of values

List of values

n	a(n)
1	8
2	12
3	15
4	16
5	20
6	21
7	28
8	30
9	32
10	33
11	35
12	36
13	39
14	42
15	44
16	45
17	51
18	52
19	55
20	57
21	63
22	64
23	65
24	66
25	68
26	69
27	70
28	75
29	76
30	77
31	78
32	85
33	87
34	90
35	91
36	92
37	93
38	95
39	99
40	100
41	102
42	108
43	110
44	111
45	114
46	115
47	116
48	117
49	119
50	123
51	124
52	126
53	128
54	129
55	130
56	133
57	135
58	138
59	141
60	143
61	145
62	147
63	148
64	150
65	153
66	154
67	155
68	159
69	161

n	a(n)
1	8
2	12
3	15
4	16
5	20
6	21
7	28
8	30
9	32
10	33
11	35
12	36
13	39
14	42
15	44
16	45
17	51
18	52
19	55
20	57
21	63
22	64
23	65
24	66
25	68
26	69
27	70
28	75
29	76
30	77
31	78
32	85
33	87
34	90
35	91
36	92
37	93
38	95
39	99
40	100
41	102
42	108
43	110
44	111
45	114
46	115
47	116
48	117
49	119
50	123
51	124
52	126
53	128
54	129
55	130
56	133
57	135
58	138
59	141
60	143
61	145
62	147
63	148
64	150
65	153
66	154
67	155
68	159
69	161

n	a(n)
1	8
2	12
3	15
4	16
5	20
6	21
7	28
8	30
9	32
10	33
11	35
12	36
13	39
14	42
15	44
16	45
17	51
18	52
19	55
20	57
21	63
22	64
23	65
24	66
25	68
26	69
27	70
28	75
29	76
30	77
31	78
32	85
33	87
34	90
35	91
36	92
37	93
38	95
39	99
40	100
41	102
42	108
43	110
44	111
45	114
46	115
47	116
48	117
49	119
50	123
51	124
52	126
53	128
54	129
55	130
56	133
57	135
58	138
59	141
60	143
61	145
62	147
63	148
64	150
65	153
66	154
67	155
68	159
69	161