A239207 - cp's OEIS frontend

A239207 a(n) = |{0 < k <= n: kp(n)q(n)*r(n) - 1 is prime}|, where p(.), q(.) and r(.) are given by A000041, A000009 and A047967 respectively.

n	a(n)
1	0
2	1
3	3
4	3
5	4
6	3
7	2
8	5
9	4
10	4
11	2
12	3
13	2
14	3
15	5
16	6
17	3
18	4
19	2
20	3
21	5
22	4
23	1
24	6
25	2
26	7
27	3
28	5
29	5
30	3
31	5
32	8
33	7
34	1
35	7
36	3
37	8
38	5
39	11
40	7
41	7
42	2
43	6
44	7
45	3
46	7
47	7
48	5
49	5
50	9
51	7
52	7
53	4
54	4
55	6
56	5
57	9
58	7
59	8
60	11
61	4
62	5
63	6
64	8
65	5
66	10
67	5
68	6
69	9
70	7
71	10
72	6
73	5
74	5
75	10
76	9
77	8
78	3
79	4
80	1

[0, 1, 3, 3, 4, 3, 2, 5, 4, 4, 2, 3, 2, 3, 5, 6, 3, 4, 2, 3, 5, 4, 1, 6, 2, 7, 3, 5, 5, 3, 5, 8, 7, 1, 7, 3, 8, 5, 11, 7, 7, 2, 6, 7, 3, 7, 7, 5, 5, 9, 7, 7, 4, 4, 6, 5, 9, 7, 8, 11, 4, 5, 6, 8, 5, 10, 5, 6, 9, 7, 10, 6, 5, 5, 10, 9, 8, 3, 4, 1]

cp's OEIS Frontend

A239207 a(n) = |{0 < k <= n: kp(n)q(n)*r(n) - 1 is prime}|, where p(.), q(.) and r(.) are given by A000041, A000009 and A047967 respectively.

Table of values

List of values

n	a(n)
1	0
2	1
3	3
4	3
5	4
6	3
7	2
8	5
9	4
10	4
11	2
12	3
13	2
14	3
15	5
16	6
17	3
18	4
19	2
20	3
21	5
22	4
23	1
24	6
25	2
26	7
27	3
28	5
29	5
30	3
31	5
32	8
33	7
34	1
35	7
36	3
37	8
38	5
39	11
40	7
41	7
42	2
43	6
44	7
45	3
46	7
47	7
48	5
49	5
50	9
51	7
52	7
53	4
54	4
55	6
56	5
57	9
58	7
59	8
60	11
61	4
62	5
63	6
64	8
65	5
66	10
67	5
68	6
69	9
70	7
71	10
72	6
73	5
74	5
75	10
76	9
77	8
78	3
79	4
80	1

n	a(n)
1	0
2	1
3	3
4	3
5	4
6	3
7	2
8	5
9	4
10	4
11	2
12	3
13	2
14	3
15	5
16	6
17	3
18	4
19	2
20	3
21	5
22	4
23	1
24	6
25	2
26	7
27	3
28	5
29	5
30	3
31	5
32	8
33	7
34	1
35	7
36	3
37	8
38	5
39	11
40	7
41	7
42	2
43	6
44	7
45	3
46	7
47	7
48	5
49	5
50	9
51	7
52	7
53	4
54	4
55	6
56	5
57	9
58	7
59	8
60	11
61	4
62	5
63	6
64	8
65	5
66	10
67	5
68	6
69	9
70	7
71	10
72	6
73	5
74	5
75	10
76	9
77	8
78	3
79	4
80	1

cp's OEIS Frontend

A239207 a(n) = |{0 < k <= n: k*p(n)*q(n)*r(n) - 1 is prime}|, where p(.), q(.) and r(.) are given by A000041, A000009 and A047967 respectively.

Table of values

List of values

A239207 a(n) = |{0 < k <= n: kp(n)q(n)*r(n) - 1 is prime}|, where p(.), q(.) and r(.) are given by A000041, A000009 and A047967 respectively.

n	a(n)
1	0
2	1
3	3
4	3
5	4
6	3
7	2
8	5
9	4
10	4
11	2
12	3
13	2
14	3
15	5
16	6
17	3
18	4
19	2
20	3
21	5
22	4
23	1
24	6
25	2
26	7
27	3
28	5
29	5
30	3
31	5
32	8
33	7
34	1
35	7
36	3
37	8
38	5
39	11
40	7
41	7
42	2
43	6
44	7
45	3
46	7
47	7
48	5
49	5
50	9
51	7
52	7
53	4
54	4
55	6
56	5
57	9
58	7
59	8
60	11
61	4
62	5
63	6
64	8
65	5
66	10
67	5
68	6
69	9
70	7
71	10
72	6
73	5
74	5
75	10
76	9
77	8
78	3
79	4
80	1