A384469 - cp's OEIS frontend

A384469 a(n) is the number of triples 1 <= A, B, C <= n such that the discriminant D = B^2 - 4AC of the polynomial Ax^2 + Bx + C is 0.

n	a(n)
1	0
2	1
3	1
4	4
5	4
6	5
7	5
8	8
9	10
10	11
11	11
12	16
13	16
14	17
15	17
16	22
17	22
18	25
19	25
20	28
21	28
22	29
23	29
24	36
25	40
26	41
27	43
28	46
29	46
30	49
31	49
32	54
33	54
34	55
35	55
36	64
37	64
38	65
39	65
40	70
41	70
42	71
43	71
44	74
45	76
46	77
47	77
48	86
49	92
50	97
51	97
52	100
53	100
54	103
55	103
56	108
57	108
58	109
59	109
60	118
61	118
62	119
63	121
64	130

[0, 1, 1, 4, 4, 5, 5, 8, 10, 11, 11, 16, 16, 17, 17, 22, 22, 25, 25, 28, 28, 29, 29, 36, 40, 41, 43, 46, 46, 49, 49, 54, 54, 55, 55, 64, 64, 65, 65, 70, 70, 71, 71, 74, 76, 77, 77, 86, 92, 97, 97, 100, 100, 103, 103, 108, 108, 109, 109, 118, 118, 119, 121, 130]

cp's OEIS Frontend

A384469 a(n) is the number of triples 1 <= A, B, C <= n such that the discriminant D = B^2 - 4AC of the polynomial Ax^2 + Bx + C is 0.

Table of values

List of values

n	a(n)
1	0
2	1
3	1
4	4
5	4
6	5
7	5
8	8
9	10
10	11
11	11
12	16
13	16
14	17
15	17
16	22
17	22
18	25
19	25
20	28
21	28
22	29
23	29
24	36
25	40
26	41
27	43
28	46
29	46
30	49
31	49
32	54
33	54
34	55
35	55
36	64
37	64
38	65
39	65
40	70
41	70
42	71
43	71
44	74
45	76
46	77
47	77
48	86
49	92
50	97
51	97
52	100
53	100
54	103
55	103
56	108
57	108
58	109
59	109
60	118
61	118
62	119
63	121
64	130

n	a(n)
1	0
2	1
3	1
4	4
5	4
6	5
7	5
8	8
9	10
10	11
11	11
12	16
13	16
14	17
15	17
16	22
17	22
18	25
19	25
20	28
21	28
22	29
23	29
24	36
25	40
26	41
27	43
28	46
29	46
30	49
31	49
32	54
33	54
34	55
35	55
36	64
37	64
38	65
39	65
40	70
41	70
42	71
43	71
44	74
45	76
46	77
47	77
48	86
49	92
50	97
51	97
52	100
53	100
54	103
55	103
56	108
57	108
58	109
59	109
60	118
61	118
62	119
63	121
64	130

cp's OEIS Frontend

A384469 a(n) is the number of triples 1 <= A, B, C <= n such that the discriminant D = B^2 - 4*A*C of the polynomial A*x^2 + B*x + C is 0.

Table of values

List of values

A384469 a(n) is the number of triples 1 <= A, B, C <= n such that the discriminant D = B^2 - 4AC of the polynomial Ax^2 + Bx + C is 0.

n	a(n)
1	0
2	1
3	1
4	4
5	4
6	5
7	5
8	8
9	10
10	11
11	11
12	16
13	16
14	17
15	17
16	22
17	22
18	25
19	25
20	28
21	28
22	29
23	29
24	36
25	40
26	41
27	43
28	46
29	46
30	49
31	49
32	54
33	54
34	55
35	55
36	64
37	64
38	65
39	65
40	70
41	70
42	71
43	71
44	74
45	76
46	77
47	77
48	86
49	92
50	97
51	97
52	100
53	100
54	103
55	103
56	108
57	108
58	109
59	109
60	118
61	118
62	119
63	121
64	130