A347406 - cp's OEIS frontend

A347406 Earliest sequence of distinct positive integers such that both gcd(a(n),a(n-k)) = 1 and gcd(a(n),a(n+k)) = 1, where k is each divisor of a(n) and n - k >= 1.

n	a(n)
1	1
2	2
3	3
4	5
5	4
6	7
7	9
8	8
9	11
10	13
11	10
12	17
13	19
14	14
15	15
16	23
17	16
18	29
19	21
20	26
21	27
22	25
23	22
24	31
25	35
26	32
27	33
28	37
29	38
30	41
31	39
32	34
33	43
34	47
35	28
36	53
37	51
38	20
39	57
40	59
41	40
42	61
43	49
44	44
45	63
46	67
47	46
48	71
49	73
50	52
51	69
52	79
53	50
54	83
55	81
56	55
57	58
58	77
59	65
60	82
61	87
62	85
63	89
64	74
65	93
66	95
67	91
68	86
69	97
70	101
71	62
72	103
73	45
74	64
75	75

[1, 2, 3, 5, 4, 7, 9, 8, 11, 13, 10, 17, 19, 14, 15, 23, 16, 29, 21, 26, 27, 25, 22, 31, 35, 32, 33, 37, 38, 41, 39, 34, 43, 47, 28, 53, 51, 20, 57, 59, 40, 61, 49, 44, 63, 67, 46, 71, 73, 52, 69, 79, 50, 83, 81, 55, 58, 77, 65, 82, 87, 85, 89, 74, 93, 95, 91, 86, 97, 101, 62, 103, 45, 64, 75]

cp's OEIS Frontend

A347406 Earliest sequence of distinct positive integers such that both gcd(a(n),a(n-k)) = 1 and gcd(a(n),a(n+k)) = 1, where k is each divisor of a(n) and n - k >= 1.

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	5
5	4
6	7
7	9
8	8
9	11
10	13
11	10
12	17
13	19
14	14
15	15
16	23
17	16
18	29
19	21
20	26
21	27
22	25
23	22
24	31
25	35
26	32
27	33
28	37
29	38
30	41
31	39
32	34
33	43
34	47
35	28
36	53
37	51
38	20
39	57
40	59
41	40
42	61
43	49
44	44
45	63
46	67
47	46
48	71
49	73
50	52
51	69
52	79
53	50
54	83
55	81
56	55
57	58
58	77
59	65
60	82
61	87
62	85
63	89
64	74
65	93
66	95
67	91
68	86
69	97
70	101
71	62
72	103
73	45
74	64
75	75

n	a(n)
1	1
2	2
3	3
4	5
5	4
6	7
7	9
8	8
9	11
10	13
11	10
12	17
13	19
14	14
15	15
16	23
17	16
18	29
19	21
20	26
21	27
22	25
23	22
24	31
25	35
26	32
27	33
28	37
29	38
30	41
31	39
32	34
33	43
34	47
35	28
36	53
37	51
38	20
39	57
40	59
41	40
42	61
43	49
44	44
45	63
46	67
47	46
48	71
49	73
50	52
51	69
52	79
53	50
54	83
55	81
56	55
57	58
58	77
59	65
60	82
61	87
62	85
63	89
64	74
65	93
66	95
67	91
68	86
69	97
70	101
71	62
72	103
73	45
74	64
75	75

n	a(n)
1	1
2	2
3	3
4	5
5	4
6	7
7	9
8	8
9	11
10	13
11	10
12	17
13	19
14	14
15	15
16	23
17	16
18	29
19	21
20	26
21	27
22	25
23	22
24	31
25	35
26	32
27	33
28	37
29	38
30	41
31	39
32	34
33	43
34	47
35	28
36	53
37	51
38	20
39	57
40	59
41	40
42	61
43	49
44	44
45	63
46	67
47	46
48	71
49	73
50	52
51	69
52	79
53	50
54	83
55	81
56	55
57	58
58	77
59	65
60	82
61	87
62	85
63	89
64	74
65	93
66	95
67	91
68	86
69	97
70	101
71	62
72	103
73	45
74	64
75	75