A237706 - cp's OEIS frontend

A237706 Number of primes p < n with pi(n-p) a square, where pi(.) is given by A000720.

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

[0, 0, 1, 2, 1, 1, 1, 1, 2, 2, 2, 4, 3, 3, 3, 1, 1, 2, 2, 3, 3, 1, 1, 2, 3, 4, 4, 4, 4, 6, 5, 4, 4, 2, 2, 3, 3, 5, 5, 3, 3, 3, 3, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 4, 5, 5, 5, 4, 4, 7, 6, 5, 5, 4, 4, 5, 5, 7, 7, 5]

cp's OEIS Frontend

A237706 Number of primes p < n with pi(n-p) a square, where pi(.) is given by A000720.

Table of values

List of values

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

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

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