A348193 - cp's OEIS frontend

A348193 (Number of primes == 3 mod 4 less than n^2) - (number of primes == 1 mod 4 less than n^2).

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

[0, 1, 1, 1, 2, 2, 2, 1, 3, 2, 1, 3, 4, 3, 5, 5, 4, 3, 3, 3, 2, 3, 6, 6, 5, 5, 6, 4, 5, 5, 5, 5, 6, 4, 3, 3, 4, 3, 7, 12, 10, 7, 10, 8, 9, 10, 10, 7, 6, 6, 9, 8, 6, 6, 9, 6, 4, 9, 6, 8, 8, 7, 12, 11, 11, 9, 8, 9, 12, 9, 12, 17, 12, 13, 16, 12, 16, 18, 16, 15, 12, 12, 11, 17, 18, 14, 11, 13, 9, 5, 7, 7, 6, 7, 8, 7, 6, 8, 7, 10]

cp's OEIS Frontend

A348193 (Number of primes == 3 mod 4 less than n^2) - (number of primes == 1 mod 4 less than n^2).

Table of values

List of values

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

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

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