A347619 - cp's OEIS frontend

A347619 Earliest sequence of integers > 1 such that gcd(a(n),a(n+k)) = 1, where k = 1..a(n-1), with a(1) = 1 and a(2) = 2.

n	a(n)
1	1
2	2
3	3
4	2
5	5
6	3
7	7
8	2
9	5
10	11
11	7
12	3
13	5
14	13
15	17
16	2
17	5
18	11
19	19
20	3
21	5
22	13
23	7
24	11
25	5
26	23
27	29
28	13
29	17
30	31
31	19
32	11
33	23
34	2
35	37
36	41
37	5
38	7
39	37
40	3
41	43
42	47
43	17
44	7
45	23
46	43
47	37
48	31
49	53
50	59
51	29
52	11
53	23
54	61
55	67
56	71
57	73
58	2
59	13
60	79
61	83
62	7
63	13
64	19
65	23
66	89
67	97
68	101
69	103
70	43
71	13
72	107
73	109
74	41
75	79
76	113
77	127
78	3
79	5

[1, 2, 3, 2, 5, 3, 7, 2, 5, 11, 7, 3, 5, 13, 17, 2, 5, 11, 19, 3, 5, 13, 7, 11, 5, 23, 29, 13, 17, 31, 19, 11, 23, 2, 37, 41, 5, 7, 37, 3, 43, 47, 17, 7, 23, 43, 37, 31, 53, 59, 29, 11, 23, 61, 67, 71, 73, 2, 13, 79, 83, 7, 13, 19, 23, 89, 97, 101, 103, 43, 13, 107, 109, 41, 79, 113, 127, 3, 5]

cp's OEIS Frontend

A347619 Earliest sequence of integers > 1 such that gcd(a(n),a(n+k)) = 1, where k = 1..a(n-1), with a(1) = 1 and a(2) = 2.

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	2
5	5
6	3
7	7
8	2
9	5
10	11
11	7
12	3
13	5
14	13
15	17
16	2
17	5
18	11
19	19
20	3
21	5
22	13
23	7
24	11
25	5
26	23
27	29
28	13
29	17
30	31
31	19
32	11
33	23
34	2
35	37
36	41
37	5
38	7
39	37
40	3
41	43
42	47
43	17
44	7
45	23
46	43
47	37
48	31
49	53
50	59
51	29
52	11
53	23
54	61
55	67
56	71
57	73
58	2
59	13
60	79
61	83
62	7
63	13
64	19
65	23
66	89
67	97
68	101
69	103
70	43
71	13
72	107
73	109
74	41
75	79
76	113
77	127
78	3
79	5

n	a(n)
1	1
2	2
3	3
4	2
5	5
6	3
7	7
8	2
9	5
10	11
11	7
12	3
13	5
14	13
15	17
16	2
17	5
18	11
19	19
20	3
21	5
22	13
23	7
24	11
25	5
26	23
27	29
28	13
29	17
30	31
31	19
32	11
33	23
34	2
35	37
36	41
37	5
38	7
39	37
40	3
41	43
42	47
43	17
44	7
45	23
46	43
47	37
48	31
49	53
50	59
51	29
52	11
53	23
54	61
55	67
56	71
57	73
58	2
59	13
60	79
61	83
62	7
63	13
64	19
65	23
66	89
67	97
68	101
69	103
70	43
71	13
72	107
73	109
74	41
75	79
76	113
77	127
78	3
79	5

n	a(n)
1	1
2	2
3	3
4	2
5	5
6	3
7	7
8	2
9	5
10	11
11	7
12	3
13	5
14	13
15	17
16	2
17	5
18	11
19	19
20	3
21	5
22	13
23	7
24	11
25	5
26	23
27	29
28	13
29	17
30	31
31	19
32	11
33	23
34	2
35	37
36	41
37	5
38	7
39	37
40	3
41	43
42	47
43	17
44	7
45	23
46	43
47	37
48	31
49	53
50	59
51	29
52	11
53	23
54	61
55	67
56	71
57	73
58	2
59	13
60	79
61	83
62	7
63	13
64	19
65	23
66	89
67	97
68	101
69	103
70	43
71	13
72	107
73	109
74	41
75	79
76	113
77	127
78	3
79	5