A103668 - cp's OEIS frontend

A103668 Number of semiprimes between prime(n) and prime(n+1).

n	a(n)
1	0
2	1
3	1
4	2
5	0
6	2
7	0
8	2
9	2
10	0
11	3
12	2
13	0
14	1
15	2
16	3
17	0
18	2
19	1
20	0
21	2
22	1
23	3
24	4
25	0
26	0
27	1
28	0
29	1
30	6
31	1
32	2
33	0
34	5
35	0
36	1
37	3
38	1
39	1
40	2
41	0
42	3
43	0
44	1
45	0
46	6
47	7
48	1
49	0
50	0
51	2
52	0
53	2
54	2
55	2
56	2
57	0
58	1
59	1
60	0
61	3
62	7
63	1
64	0
65	1
66	6
67	2
68	3
69	0
70	0
71	2
72	3
73	1
74	1
75	2
76	1
77	4
78	1
79	2
80	4
81	0
82	2
83	0
84	1
85	0
86	3
87	3
88	1
89	0
90	1
91	4
92	3
93	1
94	2
95	2
96	1
97	5
98	0
99	7
100	3
101	3
102	2
103	2
104	0
105	1

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

cp's OEIS Frontend

A103668 Number of semiprimes between prime(n) and prime(n+1).

Table of values

List of values

n	a(n)
1	0
2	1
3	1
4	2
5	0
6	2
7	0
8	2
9	2
10	0
11	3
12	2
13	0
14	1
15	2
16	3
17	0
18	2
19	1
20	0
21	2
22	1
23	3
24	4
25	0
26	0
27	1
28	0
29	1
30	6
31	1
32	2
33	0
34	5
35	0
36	1
37	3
38	1
39	1
40	2
41	0
42	3
43	0
44	1
45	0
46	6
47	7
48	1
49	0
50	0
51	2
52	0
53	2
54	2
55	2
56	2
57	0
58	1
59	1
60	0
61	3
62	7
63	1
64	0
65	1
66	6
67	2
68	3
69	0
70	0
71	2
72	3
73	1
74	1
75	2
76	1
77	4
78	1
79	2
80	4
81	0
82	2
83	0
84	1
85	0
86	3
87	3
88	1
89	0
90	1
91	4
92	3
93	1
94	2
95	2
96	1
97	5
98	0
99	7
100	3
101	3
102	2
103	2
104	0
105	1

n	a(n)
1	0
2	1
3	1
4	2
5	0
6	2
7	0
8	2
9	2
10	0
11	3
12	2
13	0
14	1
15	2
16	3
17	0
18	2
19	1
20	0
21	2
22	1
23	3
24	4
25	0
26	0
27	1
28	0
29	1
30	6
31	1
32	2
33	0
34	5
35	0
36	1
37	3
38	1
39	1
40	2
41	0
42	3
43	0
44	1
45	0
46	6
47	7
48	1
49	0
50	0
51	2
52	0
53	2
54	2
55	2
56	2
57	0
58	1
59	1
60	0
61	3
62	7
63	1
64	0
65	1
66	6
67	2
68	3
69	0
70	0
71	2
72	3
73	1
74	1
75	2
76	1
77	4
78	1
79	2
80	4
81	0
82	2
83	0
84	1
85	0
86	3
87	3
88	1
89	0
90	1
91	4
92	3
93	1
94	2
95	2
96	1
97	5
98	0
99	7
100	3
101	3
102	2
103	2
104	0
105	1

n	a(n)
1	0
2	1
3	1
4	2
5	0
6	2
7	0
8	2
9	2
10	0
11	3
12	2
13	0
14	1
15	2
16	3
17	0
18	2
19	1
20	0
21	2
22	1
23	3
24	4
25	0
26	0
27	1
28	0
29	1
30	6
31	1
32	2
33	0
34	5
35	0
36	1
37	3
38	1
39	1
40	2
41	0
42	3
43	0
44	1
45	0
46	6
47	7
48	1
49	0
50	0
51	2
52	0
53	2
54	2
55	2
56	2
57	0
58	1
59	1
60	0
61	3
62	7
63	1
64	0
65	1
66	6
67	2
68	3
69	0
70	0
71	2
72	3
73	1
74	1
75	2
76	1
77	4
78	1
79	2
80	4
81	0
82	2
83	0
84	1
85	0
86	3
87	3
88	1
89	0
90	1
91	4
92	3
93	1
94	2
95	2
96	1
97	5
98	0
99	7
100	3
101	3
102	2
103	2
104	0
105	1