A107628 - cp's OEIS frontend

A107628 Number of integral quadratic forms ax^2 + bxy + cy^2 whose discriminant b^2-4ac is -n, 0 <= b <= a <= c and gcd(a,b,c) = 1.

n	a(n)
1	0
2	0
3	1
4	1
5	0
6	0
7	1
8	1
9	0
10	0
11	1
12	1
13	0
14	0
15	2
16	1
17	0
18	0
19	1
20	2
21	0
22	0
23	2
24	2
25	0
26	0
27	1
28	1
29	0
30	0
31	2
32	2
33	0
34	0
35	2
36	2
37	0
38	0
39	3
40	2
41	0
42	0
43	1
44	2
45	0
46	0
47	3
48	2
49	0
50	0
51	2
52	2
53	0
54	0
55	3
56	3
57	0
58	0
59	2
60	2
61	0
62	0
63	3
64	2
65	0
66	0
67	1
68	3
69	0
70	0
71	4
72	2
73	0
74	0
75	2
76	2
77	0
78	0
79	3
80	3
81	0
82	0
83	2
84	4
85	0
86	0
87	4
88	2
89	0
90	0
91	2
92	2
93	0
94	0
95	5
96	4
97	0
98	0
99	2
100	2
101	0
102	0
103	3
104	4
105	0

[0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 2, 1, 0, 0, 1, 2, 0, 0, 2, 2, 0, 0, 1, 1, 0, 0, 2, 2, 0, 0, 2, 2, 0, 0, 3, 2, 0, 0, 1, 2, 0, 0, 3, 2, 0, 0, 2, 2, 0, 0, 3, 3, 0, 0, 2, 2, 0, 0, 3, 2, 0, 0, 1, 3, 0, 0, 4, 2, 0, 0, 2, 2, 0, 0, 3, 3, 0, 0, 2, 4, 0, 0, 4, 2, 0, 0, 2, 2, 0, 0, 5, 4, 0, 0, 2, 2, 0, 0, 3, 4, 0]

cp's OEIS Frontend

A107628 Number of integral quadratic forms ax^2 + bxy + cy^2 whose discriminant b^2-4ac is -n, 0 <= b <= a <= c and gcd(a,b,c) = 1.

Table of values

List of values

n	a(n)
1	0
2	0
3	1
4	1
5	0
6	0
7	1
8	1
9	0
10	0
11	1
12	1
13	0
14	0
15	2
16	1
17	0
18	0
19	1
20	2
21	0
22	0
23	2
24	2
25	0
26	0
27	1
28	1
29	0
30	0
31	2
32	2
33	0
34	0
35	2
36	2
37	0
38	0
39	3
40	2
41	0
42	0
43	1
44	2
45	0
46	0
47	3
48	2
49	0
50	0
51	2
52	2
53	0
54	0
55	3
56	3
57	0
58	0
59	2
60	2
61	0
62	0
63	3
64	2
65	0
66	0
67	1
68	3
69	0
70	0
71	4
72	2
73	0
74	0
75	2
76	2
77	0
78	0
79	3
80	3
81	0
82	0
83	2
84	4
85	0
86	0
87	4
88	2
89	0
90	0
91	2
92	2
93	0
94	0
95	5
96	4
97	0
98	0
99	2
100	2
101	0
102	0
103	3
104	4
105	0

n	a(n)
1	0
2	0
3	1
4	1
5	0
6	0
7	1
8	1
9	0
10	0
11	1
12	1
13	0
14	0
15	2
16	1
17	0
18	0
19	1
20	2
21	0
22	0
23	2
24	2
25	0
26	0
27	1
28	1
29	0
30	0
31	2
32	2
33	0
34	0
35	2
36	2
37	0
38	0
39	3
40	2
41	0
42	0
43	1
44	2
45	0
46	0
47	3
48	2
49	0
50	0
51	2
52	2
53	0
54	0
55	3
56	3
57	0
58	0
59	2
60	2
61	0
62	0
63	3
64	2
65	0
66	0
67	1
68	3
69	0
70	0
71	4
72	2
73	0
74	0
75	2
76	2
77	0
78	0
79	3
80	3
81	0
82	0
83	2
84	4
85	0
86	0
87	4
88	2
89	0
90	0
91	2
92	2
93	0
94	0
95	5
96	4
97	0
98	0
99	2
100	2
101	0
102	0
103	3
104	4
105	0

n	a(n)
1	0
2	0
3	1
4	1
5	0
6	0
7	1
8	1
9	0
10	0
11	1
12	1
13	0
14	0
15	2
16	1
17	0
18	0
19	1
20	2
21	0
22	0
23	2
24	2
25	0
26	0
27	1
28	1
29	0
30	0
31	2
32	2
33	0
34	0
35	2
36	2
37	0
38	0
39	3
40	2
41	0
42	0
43	1
44	2
45	0
46	0
47	3
48	2
49	0
50	0
51	2
52	2
53	0
54	0
55	3
56	3
57	0
58	0
59	2
60	2
61	0
62	0
63	3
64	2
65	0
66	0
67	1
68	3
69	0
70	0
71	4
72	2
73	0
74	0
75	2
76	2
77	0
78	0
79	3
80	3
81	0
82	0
83	2
84	4
85	0
86	0
87	4
88	2
89	0
90	0
91	2
92	2
93	0
94	0
95	5
96	4
97	0
98	0
99	2
100	2
101	0
102	0
103	3
104	4
105	0