Number of (n+1)X(3+1) 0..2 arrays x(i,j) with every row sum{j*x(i,j), j=1..3+1} equal, and every column sum{i*x(i,j), i=1..n+1} equal.

A232611

Number of (n+1)X(3+1) 0..2 arrays x(i,j) with every row sum{j*x(i,j), j=1..3+1} equal, and every column sum{i*x(i,j), i=1..n+1} equal.