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

A232873

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

Terms

    a(0) =25a(1) =130a(2) =650a(3) =2715a(4) =8988a(5) =26553a(6) =74515a(7) =202293a(8) =523052a(9) =1268666a(10) =2897425a(11) =6311293a(12) =13270455a(13) =26979740a(14) =53109749a(15) =101190045a(16) =187316955a(17) =338279583a(18) =597743822a(19) =1035188036a(20) =1758172498a(21) =2931994598a(22) =4807675414a(23) =7759356347a(24) =12338518046

External references