A077774 - cp's OEIS frontend

A077774 Number of integers between n^2 and (n+1)^2 that are the sum of two coprime squares of opposite parity; multiple representations are counted once.

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

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

cp's OEIS Frontend

A077774 Number of integers between n^2 and (n+1)^2 that are the sum of two coprime squares of opposite parity; multiple representations are counted once.

Table of values

List of values

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

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

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