A306999 - cp's OEIS frontend

A306999 Numbers m such that 1 < gcd(m, 21) < m and m does not divide 21^e for e >= 0.

n	a(n)
1	6
2	12
3	14
4	15
5	18
6	24
7	28
8	30
9	33
10	35
11	36
12	39
13	42
14	45
15	48
16	51
17	54
18	56
19	57
20	60
21	66
22	69
23	70
24	72
25	75
26	77
27	78
28	84
29	87
30	90
31	91
32	93
33	96
34	98
35	99
36	102
37	105
38	108
39	111
40	112
41	114
42	117
43	119
44	120
45	123
46	126
47	129
48	132
49	133
50	135
51	138
52	140
53	141
54	144
55	150
56	153
57	154
58	156
59	159
60	161

[6, 12, 14, 15, 18, 24, 28, 30, 33, 35, 36, 39, 42, 45, 48, 51, 54, 56, 57, 60, 66, 69, 70, 72, 75, 77, 78, 84, 87, 90, 91, 93, 96, 98, 99, 102, 105, 108, 111, 112, 114, 117, 119, 120, 123, 126, 129, 132, 133, 135, 138, 140, 141, 144, 150, 153, 154, 156, 159, 161]

cp's OEIS Frontend

A306999 Numbers m such that 1 < gcd(m, 21) < m and m does not divide 21^e for e >= 0.

Table of values

List of values

n	a(n)
1	6
2	12
3	14
4	15
5	18
6	24
7	28
8	30
9	33
10	35
11	36
12	39
13	42
14	45
15	48
16	51
17	54
18	56
19	57
20	60
21	66
22	69
23	70
24	72
25	75
26	77
27	78
28	84
29	87
30	90
31	91
32	93
33	96
34	98
35	99
36	102
37	105
38	108
39	111
40	112
41	114
42	117
43	119
44	120
45	123
46	126
47	129
48	132
49	133
50	135
51	138
52	140
53	141
54	144
55	150
56	153
57	154
58	156
59	159
60	161

n	a(n)
1	6
2	12
3	14
4	15
5	18
6	24
7	28
8	30
9	33
10	35
11	36
12	39
13	42
14	45
15	48
16	51
17	54
18	56
19	57
20	60
21	66
22	69
23	70
24	72
25	75
26	77
27	78
28	84
29	87
30	90
31	91
32	93
33	96
34	98
35	99
36	102
37	105
38	108
39	111
40	112
41	114
42	117
43	119
44	120
45	123
46	126
47	129
48	132
49	133
50	135
51	138
52	140
53	141
54	144
55	150
56	153
57	154
58	156
59	159
60	161

n	a(n)
1	6
2	12
3	14
4	15
5	18
6	24
7	28
8	30
9	33
10	35
11	36
12	39
13	42
14	45
15	48
16	51
17	54
18	56
19	57
20	60
21	66
22	69
23	70
24	72
25	75
26	77
27	78
28	84
29	87
30	90
31	91
32	93
33	96
34	98
35	99
36	102
37	105
38	108
39	111
40	112
41	114
42	117
43	119
44	120
45	123
46	126
47	129
48	132
49	133
50	135
51	138
52	140
53	141
54	144
55	150
56	153
57	154
58	156
59	159
60	161