A237712 - cp's OEIS frontend

A237712 a(n) = |{0 < k < n: kn + pi(kn) is prime}|, where pi(.) is given by A000720.

n	a(n)
1	0
2	1
3	1
4	1
5	0
6	1
7	3
8	1
9	3
10	1
11	2
12	3
13	4
14	3
15	3
16	2
17	2
18	4
19	4
20	1
21	5
22	2
23	2
24	4
25	2
26	6
27	8
28	5
29	6
30	3
31	4
32	5
33	2
34	4
35	3
36	3
37	8
38	5
39	8
40	6
41	4
42	3
43	10
44	6
45	6
46	5
47	1
48	7
49	4
50	4
51	6
52	9
53	6
54	9
55	5
56	4
57	6
58	10
59	3
60	7
61	7
62	6
63	3
64	8
65	13
66	5
67	8
68	3
69	9
70	11
71	4
72	8
73	6
74	8
75	11
76	11
77	11
78	12
79	13
80	12
81	10
82	6
83	7
84	7
85	4
86	16
87	10
88	8
89	9
90	4
91	6
92	14
93	11
94	7
95	4
96	13
97	10
98	13
99	8
100	10

[0, 1, 1, 1, 0, 1, 3, 1, 3, 1, 2, 3, 4, 3, 3, 2, 2, 4, 4, 1, 5, 2, 2, 4, 2, 6, 8, 5, 6, 3, 4, 5, 2, 4, 3, 3, 8, 5, 8, 6, 4, 3, 10, 6, 6, 5, 1, 7, 4, 4, 6, 9, 6, 9, 5, 4, 6, 10, 3, 7, 7, 6, 3, 8, 13, 5, 8, 3, 9, 11, 4, 8, 6, 8, 11, 11, 11, 12, 13, 12, 10, 6, 7, 7, 4, 16, 10, 8, 9, 4, 6, 14, 11, 7, 4, 13, 10, 13, 8, 10]

cp's OEIS Frontend

A237712 a(n) = |{0 < k < n: kn + pi(kn) is prime}|, where pi(.) is given by A000720.

Table of values

List of values

n	a(n)
1	0
2	1
3	1
4	1
5	0
6	1
7	3
8	1
9	3
10	1
11	2
12	3
13	4
14	3
15	3
16	2
17	2
18	4
19	4
20	1
21	5
22	2
23	2
24	4
25	2
26	6
27	8
28	5
29	6
30	3
31	4
32	5
33	2
34	4
35	3
36	3
37	8
38	5
39	8
40	6
41	4
42	3
43	10
44	6
45	6
46	5
47	1
48	7
49	4
50	4
51	6
52	9
53	6
54	9
55	5
56	4
57	6
58	10
59	3
60	7
61	7
62	6
63	3
64	8
65	13
66	5
67	8
68	3
69	9
70	11
71	4
72	8
73	6
74	8
75	11
76	11
77	11
78	12
79	13
80	12
81	10
82	6
83	7
84	7
85	4
86	16
87	10
88	8
89	9
90	4
91	6
92	14
93	11
94	7
95	4
96	13
97	10
98	13
99	8
100	10

n	a(n)
1	0
2	1
3	1
4	1
5	0
6	1
7	3
8	1
9	3
10	1
11	2
12	3
13	4
14	3
15	3
16	2
17	2
18	4
19	4
20	1
21	5
22	2
23	2
24	4
25	2
26	6
27	8
28	5
29	6
30	3
31	4
32	5
33	2
34	4
35	3
36	3
37	8
38	5
39	8
40	6
41	4
42	3
43	10
44	6
45	6
46	5
47	1
48	7
49	4
50	4
51	6
52	9
53	6
54	9
55	5
56	4
57	6
58	10
59	3
60	7
61	7
62	6
63	3
64	8
65	13
66	5
67	8
68	3
69	9
70	11
71	4
72	8
73	6
74	8
75	11
76	11
77	11
78	12
79	13
80	12
81	10
82	6
83	7
84	7
85	4
86	16
87	10
88	8
89	9
90	4
91	6
92	14
93	11
94	7
95	4
96	13
97	10
98	13
99	8
100	10

cp's OEIS Frontend

A237712 a(n) = |{0 < k < n: k*n + pi(k*n) is prime}|, where pi(.) is given by A000720.

Table of values

List of values

A237712 a(n) = |{0 < k < n: kn + pi(kn) is prime}|, where pi(.) is given by A000720.

n	a(n)
1	0
2	1
3	1
4	1
5	0
6	1
7	3
8	1
9	3
10	1
11	2
12	3
13	4
14	3
15	3
16	2
17	2
18	4
19	4
20	1
21	5
22	2
23	2
24	4
25	2
26	6
27	8
28	5
29	6
30	3
31	4
32	5
33	2
34	4
35	3
36	3
37	8
38	5
39	8
40	6
41	4
42	3
43	10
44	6
45	6
46	5
47	1
48	7
49	4
50	4
51	6
52	9
53	6
54	9
55	5
56	4
57	6
58	10
59	3
60	7
61	7
62	6
63	3
64	8
65	13
66	5
67	8
68	3
69	9
70	11
71	4
72	8
73	6
74	8
75	11
76	11
77	11
78	12
79	13
80	12
81	10
82	6
83	7
84	7
85	4
86	16
87	10
88	8
89	9
90	4
91	6
92	14
93	11
94	7
95	4
96	13
97	10
98	13
99	8
100	10