Number of (6+1)X(n+1) 0..1 arrays x(i,j) with row sums sum{j*x(i,j), j=1..n+1} nondecreasing, and column sums sum{i^2*x(i,j), i=1..6+1} nondecreasing.

A233371

Number of (6+1)X(n+1) 0..1 arrays x(i,j) with row sums sum{j*x(i,j), j=1..n+1} nondecreasing, and column sums sum{i^2*x(i,j), i=1..6+1} nondecreasing.

Terms

    a(0) =81a(1) =1928a(2) =38240a(3) =781467a(4) =15009944a(5) =270547199a(6) =4578333280a(7) =72152875243

External references