A113971 - cp's OEIS frontend

A113971 Number of semiprimes from n to (4/3)*n.

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

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

cp's OEIS Frontend

A113971 Number of semiprimes from n to (4/3)*n.

Table of values

List of values

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

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

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