A385029 - cp's OEIS frontend

A385029 a(n) = Sum_{-n <= a, b, c <= n} (b^2 - 4ac).

n	a(n)
1	18
2	250
3	1372
4	4860
5	13310
6	30758
7	63000
8	117912
9	205770
10	339570
11	535348
12	812500
13	1194102
14	1707230
15	2383280
16	3258288
17	4373250
18	5774442
19	7513740
20	9648940
21	12244078
22	15369750
23	19103432
24	23529800
25	28741050
26	34837218
27	41926500
28	50125572
29	59559910
30	70364110
31	82682208
32	96668000

[18, 250, 1372, 4860, 13310, 30758, 63000, 117912, 205770, 339570, 535348, 812500, 1194102, 1707230, 2383280, 3258288, 4373250, 5774442, 7513740, 9648940, 12244078, 15369750, 19103432, 23529800, 28741050, 34837218, 41926500, 50125572, 59559910, 70364110, 82682208, 96668000]

cp's OEIS Frontend

A385029 a(n) = Sum_{-n <= a, b, c <= n} (b^2 - 4ac).

Table of values

List of values

cp's OEIS Frontend

A385029 a(n) = Sum_{-n <= a, b, c <= n} (b^2 - 4*a*c).

Table of values

List of values

A385029 a(n) = Sum_{-n <= a, b, c <= n} (b^2 - 4ac).