A089994 - cp's OEIS frontend

A089994 Number of primes between factors of n-th semiprime.

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

[0, 0, 0, 1, 2, 0, 1, 3, 0, 4, 2, 5, 0, 6, 3, 7, 0, 4, 1, 5, 8, 9, 2, 6, 10, 0, 11, 3, 12, 7, 1, 8, 13, 4, 14, 9, 5, 15, 2, 0, 16, 10, 11, 3, 17, 12, 18, 0, 6, 19, 7, 20, 13, 4, 21, 0, 14, 22, 15, 8, 1, 23, 16, 24, 5, 9, 25, 2, 17, 26, 10, 6, 27, 18, 0, 28, 11, 19, 1, 20, 3, 29, 7, 30]

cp's OEIS Frontend

A089994 Number of primes between factors of n-th semiprime.

Table of values

List of values

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

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

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