A309121 - cp's OEIS frontend

A309121 a(n) gives the number of primes in the interval I_j = [(j^2 + 3j - 2)/2, j(j + 5)/2] = [A034856(j), A095998(j)], for j >= 1.

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

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

cp's OEIS Frontend

A309121 a(n) gives the number of primes in the interval I_j = [(j^2 + 3j - 2)/2, j(j + 5)/2] = [A034856(j), A095998(j)], for j >= 1.

Table of values

List of values

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

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

cp's OEIS Frontend

A309121 a(n) gives the number of primes in the interval I_j = [(j^2 + 3*j - 2)/2, j*(j + 5)/2] = [A034856(j), A095998(j)], for j >= 1.

Table of values

List of values

A309121 a(n) gives the number of primes in the interval I_j = [(j^2 + 3j - 2)/2, j(j + 5)/2] = [A034856(j), A095998(j)], for j >= 1.

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