A099903 - cp's OEIS frontend

A099903 Sum of all matrix elements of n X n matrix M(i,j) = i^3+j^3, (i,j = 1..n). a(n) = n^3*(n+1)^2/2.

n	a(n)
1	2
2	36
3	216
4	800
5	2250
6	5292
7	10976
8	20736
9	36450
10	60500
11	95832
12	146016
13	215306
14	308700
15	432000
16	591872
17	795906
18	1052676
19	1371800
20	1764000
21	2241162
22	2816396
23	3504096
24	4320000
25	5281250
26	6406452
27	7715736
28	9230816
29	10975050
30	12973500

[2, 36, 216, 800, 2250, 5292, 10976, 20736, 36450, 60500, 95832, 146016, 215306, 308700, 432000, 591872, 795906, 1052676, 1371800, 1764000, 2241162, 2816396, 3504096, 4320000, 5281250, 6406452, 7715736, 9230816, 10975050, 12973500]

cp's OEIS Frontend

A099903 Sum of all matrix elements of n X n matrix M(i,j) = i^3+j^3, (i,j = 1..n). a(n) = n^3*(n+1)^2/2.

Table of values

List of values