Number of (n+1)X(1+1) 0..3 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.

A232678

Number of (n+1)X(1+1) 0..3 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) =86a(1) =562a(2) =2985a(3) =14027a(4) =59228a(5) =229332a(6) =831604a(7) =2851809a(8) =9325995a(9) =29328607a(10) =89150381a(11) =263046025a(12) =756504326a(13) =2126823610a(14) =5859328828a(15) =15854904128a(16) =42214959089a(17) =110768292616a(18) =286828441922a(19) =733847705458

External references