A334880 - cp's OEIS frontend

A334880 Numbers k such that gcd(k, k-th composite number) > 1.

n	a(n)
1	2
2	5
3	6
4	7
5	10
6	12
7	14
8	15
9	16
10	18
11	20
12	21
13	22
14	24
15	26
16	28
17	30
18	32
19	34
20	36
21	42
22	48
23	50
24	51
25	52
26	54
27	55
28	56
29	60
30	62
31	63
32	64
33	65
34	70
35	72
36	74
37	75
38	76
39	77
40	78
41	80
42	81
43	82
44	93
45	96
46	98
47	99
48	102
49	104
50	105
51	110
52	112
53	114
54	120
55	122
56	124
57	126
58	128
59	130
60	132
61	138
62	148

[2, 5, 6, 7, 10, 12, 14, 15, 16, 18, 20, 21, 22, 24, 26, 28, 30, 32, 34, 36, 42, 48, 50, 51, 52, 54, 55, 56, 60, 62, 63, 64, 65, 70, 72, 74, 75, 76, 77, 78, 80, 81, 82, 93, 96, 98, 99, 102, 104, 105, 110, 112, 114, 120, 122, 124, 126, 128, 130, 132, 138, 148]

cp's OEIS Frontend

A334880 Numbers k such that gcd(k, k-th composite number) > 1.

Table of values

List of values

n	a(n)
1	2
2	5
3	6
4	7
5	10
6	12
7	14
8	15
9	16
10	18
11	20
12	21
13	22
14	24
15	26
16	28
17	30
18	32
19	34
20	36
21	42
22	48
23	50
24	51
25	52
26	54
27	55
28	56
29	60
30	62
31	63
32	64
33	65
34	70
35	72
36	74
37	75
38	76
39	77
40	78
41	80
42	81
43	82
44	93
45	96
46	98
47	99
48	102
49	104
50	105
51	110
52	112
53	114
54	120
55	122
56	124
57	126
58	128
59	130
60	132
61	138
62	148

n	a(n)
1	2
2	5
3	6
4	7
5	10
6	12
7	14
8	15
9	16
10	18
11	20
12	21
13	22
14	24
15	26
16	28
17	30
18	32
19	34
20	36
21	42
22	48
23	50
24	51
25	52
26	54
27	55
28	56
29	60
30	62
31	63
32	64
33	65
34	70
35	72
36	74
37	75
38	76
39	77
40	78
41	80
42	81
43	82
44	93
45	96
46	98
47	99
48	102
49	104
50	105
51	110
52	112
53	114
54	120
55	122
56	124
57	126
58	128
59	130
60	132
61	138
62	148

n	a(n)
1	2
2	5
3	6
4	7
5	10
6	12
7	14
8	15
9	16
10	18
11	20
12	21
13	22
14	24
15	26
16	28
17	30
18	32
19	34
20	36
21	42
22	48
23	50
24	51
25	52
26	54
27	55
28	56
29	60
30	62
31	63
32	64
33	65
34	70
35	72
36	74
37	75
38	76
39	77
40	78
41	80
42	81
43	82
44	93
45	96
46	98
47	99
48	102
49	104
50	105
51	110
52	112
53	114
54	120
55	122
56	124
57	126
58	128
59	130
60	132
61	138
62	148