A077769 - cp's OEIS frontend

A077769 Number of times that the sum of two coprime squares of opposite parity is an integer between n^2 and (n+1)^2; multiple representations are counted multiply.

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

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

cp's OEIS Frontend

A077769 Number of times that the sum of two coprime squares of opposite parity is an integer between n^2 and (n+1)^2; multiple representations are counted multiply.

Table of values

List of values

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

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

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