An n x n array v is defined as follows ;v[i,j]=i-j for all i , j 1<=i <=n, i<=j <=nThe sum of the elements of the array v is-

An n x n array v is defined as follows ;
v[i,j]=i-j for all i , j 1<=i <=n, i<=j <=n

The sum of the elements of the array v is-