Number of (n+1)X(4+1) 0..1 arrays x(i,j) with row sums sum{j*x(i,j), j=1..4+1} nondecreasing, and column sums sum{i*x(i,j), i=1..n+1} nondecreasing.

A232828

Number of (n+1)X(4+1) 0..1 arrays x(i,j) with row sums sum{j*x(i,j), j=1..4+1} nondecreasing, and column sums sum{i*x(i,j), i=1..n+1} nondecreasing.

Terms

    a(0) =36a(1) =316a(2) =2329a(3) =16684a(4) =111870a(5) =706823a(6) =4251357a(7) =24298903a(8) =132106886a(9) =687220332a(10) =3437408202a(11) =16607221811a(12) =77820433157

External references