A085342 - cp's OEIS frontend

A085342 Number of primes between phi(n) and n, where n is included in the count if it is a prime, while phi(n) is never included in the count even if it is a prime.

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

[0, 1, 1, 1, 1, 2, 1, 2, 1, 2, 1, 3, 1, 3, 2, 2, 1, 4, 1, 4, 3, 4, 1, 5, 1, 4, 2, 4, 1, 6, 1, 5, 3, 5, 2, 6, 1, 5, 3, 6, 1, 8, 1, 6, 5, 6, 1, 9, 2, 7, 4, 6, 1, 9, 4, 7, 5, 7, 1, 11, 1, 8, 7, 7, 3, 10, 1, 8, 5, 10, 1, 11, 1, 10, 9, 10, 4, 12, 1, 11, 6, 10, 1, 14, 5, 10, 7, 11, 1, 15, 4, 10, 7, 10, 4, 13, 1]

cp's OEIS Frontend

A085342 Number of primes between phi(n) and n, where n is included in the count if it is a prime, while phi(n) is never included in the count even if it is a prime.

Table of values

List of values

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

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

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