A216505 - cp's OEIS frontend

A216505 Number of values of k for which n can be written in the form a^2+k*b^2, a > 0, b > 0, k >= 0.

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

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

cp's OEIS Frontend

A216505 Number of values of k for which n can be written in the form a^2+k*b^2, a > 0, b > 0, k >= 0.

Table of values

List of values

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

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

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