A305494 - cp's OEIS frontend

A305494 Let s(D) = Sum_{(a,b,c)} j((-b+sqrt(D))/(2a)) where (a,b,c) is taken over all the primitive reduced binary quadratic forms ax^2+bxy+cy^2 with b^2-4*ac = D. This sequence is s(D) as D runs through the numbers -3, -4, -7, -8, -11, -12, ... .

n	a(n)
1	0
2	1728
3	-3375
4	8000
5	-32768
6	54000
7	-191025
8	287496
9	-884736
10	1264000
11	-3491750
12	4834944
13	-12288000
14	16581375
15	-39491307
16	52250000
17	-117964800
18	153542016
19	-331531596
20	425692800
21	-884736000
22	1122662608
23	-2257834125
24	2835810000
25	-5541101568
26	6896880000
27	-13136684625

[0, 1728, -3375, 8000, -32768, 54000, -191025, 287496, -884736, 1264000, -3491750, 4834944, -12288000, 16581375, -39491307, 52250000, -117964800, 153542016, -331531596, 425692800, -884736000, 1122662608, -2257834125, 2835810000, -5541101568, 6896880000, -13136684625]

cp's OEIS Frontend

A305494 Let s(D) = Sum_{(a,b,c)} j((-b+sqrt(D))/(2a)) where (a,b,c) is taken over all the primitive reduced binary quadratic forms ax^2+bxy+cy^2 with b^2-4*ac = D. This sequence is s(D) as D runs through the numbers -3, -4, -7, -8, -11, -12, ... .

Table of values

List of values

cp's OEIS Frontend

A305494 Let s(D) = Sum_{(a,b,c)} j((-b+sqrt(D))/(2*a)) where (a,b,c) is taken over all the primitive reduced binary quadratic forms a*x^2+b*xy+c*y^2 with b^2-4*ac = D. This sequence is s(D) as D runs through the numbers -3, -4, -7, -8, -11, -12, ... .

Table of values

List of values

A305494 Let s(D) = Sum_{(a,b,c)} j((-b+sqrt(D))/(2a)) where (a,b,c) is taken over all the primitive reduced binary quadratic forms ax^2+bxy+cy^2 with b^2-4*ac = D. This sequence is s(D) as D runs through the numbers -3, -4, -7, -8, -11, -12, ... .