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

A232775

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

Terms

    a(0) =30a(1) =118a(2) =387a(3) =1175a(4) =3294a(5) =8679a(6) =21991a(7) =53823a(8) =127874a(9) =298046a(10) =682459a(11) =1538297a(12) =3431277a(13) =7577602a(14) =16580065a(15) =36051756a(16) =77908855a(17) =167365984a(18) =358088629a(19) =762995256a(20) =1619108191a(21) =3426195330a(22) =7228924583a(23) =15206904198a(24) =31924025361

External references