A216674 - cp's OEIS frontend

A216674 Total number of solutions to the equation x^2+k*y^2 = n with x > 0, y > 0, k >= 0, or 0 if infinite. (Order does not matter for the equation x^2+y^2 = n).

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

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

cp's OEIS Frontend

A216674 Total number of solutions to the equation x^2+k*y^2 = n with x > 0, y > 0, k >= 0, or 0 if infinite. (Order does not matter for the equation x^2+y^2 = n).

Table of values

List of values

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

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

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