A358127 - cp's OEIS frontend

A358127 a(n) is the cardinality of the set of pairwise gcd's of {prime(1)+1, ..., prime(n)+1}.

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

[1, 3, 4, 5, 5, 5, 5, 7, 8, 8, 8, 9, 9, 11, 12, 14, 14, 14, 14, 14, 14, 15, 15, 15, 16, 16, 18, 19, 20, 21, 22, 22, 23, 23, 23, 23, 23, 24, 24, 26, 27, 29, 29, 30, 32, 32, 33, 35, 36, 36, 37, 37, 37, 37, 38, 38, 39, 39, 39, 39, 40, 40, 42, 42, 43, 43, 43, 44, 45, 45, 48, 48, 48, 48, 50, 50, 50, 50]

cp's OEIS Frontend

A358127 a(n) is the cardinality of the set of pairwise gcd's of {prime(1)+1, ..., prime(n)+1}.

Table of values

List of values

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

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

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