A319506 - cp's OEIS frontend

A319506 Number of numbers of the form 2p or 3p between consecutive triangular numbers T(n - 1) < {2,3}*p <= T(n) with p prime.

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

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

cp's OEIS Frontend

A319506 Number of numbers of the form 2p or 3p between consecutive triangular numbers T(n - 1) < {2,3}*p <= T(n) with p prime.

Table of values

List of values

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

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

cp's OEIS Frontend

A319506 Number of numbers of the form 2*p or 3*p between consecutive triangular numbers T(n - 1) < {2,3}*p <= T(n) with p prime.

Table of values

List of values

A319506 Number of numbers of the form 2p or 3p between consecutive triangular numbers T(n - 1) < {2,3}*p <= T(n) with p prime.

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