A066888 - cp's OEIS frontend

A066888 Number of primes p between triangular numbers T(n) < p <= T(n+1).

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

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

cp's OEIS Frontend

A066888 Number of primes p between triangular numbers T(n) < p <= T(n+1).

Table of values

List of values

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

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

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