A342870 - cp's OEIS frontend

A342870 a(n) is the number of twin primes between A001359(n)^2 and A001359(n)*(A001359(n)+1).

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

[1, 1, 0, 0, 1, 2, 2, 1, 2, 2, 0, 2, 4, 1, 1, 1, 5, 1, 3, 4, 2, 5, 4, 2, 4, 3, 6, 6, 3, 5, 6, 6, 4, 6, 4, 7, 9, 6, 8, 9, 6, 8, 10, 6, 11, 9, 13, 8, 12, 6, 14, 4, 7, 11, 11, 15, 9, 10, 12, 11, 10, 12, 13, 8, 15, 14, 11, 12, 9, 11, 15, 14, 18, 16, 11, 18, 10]

cp's OEIS Frontend

A342870 a(n) is the number of twin primes between A001359(n)^2 and A001359(n)*(A001359(n)+1).

Table of values

List of values

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

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

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