A049084 - cp's OEIS frontend

A049084 a(n) = pi(n) if n is prime, otherwise 0.

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

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

cp's OEIS Frontend

A049084 a(n) = pi(n) if n is prime, otherwise 0.

Table of values

List of values

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

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

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