Number of (n+1)X3 0..2 arrays with column and row pair sums b(i,j)=a(i,j)+a(i,j-1) and c(i,j)=a(i,j)+a(i-1,j) such that rows of b(i,j) and columns of c(i,j) are lexicographically nondecreasing.

A203959

Number of (n+1)X3 0..2 arrays with column and row pair sums b(i,j)=a(i,j)+a(i,j-1) and c(i,j)=a(i,j)+a(i-1,j) such that rows of b(i,j) and columns of c(i,j) are lexicographically nondecreasing.

Terms

    a(0) =121a(1) =851a(2) =6586a(3) =45307a(4) =276516a(5) =1512850a(6) =7559349a(7) =35013044a(8) =152204393a(9) =627158203a(10) =2469369220a(11) =9352485042a(12) =34260022340a(13) =121947287786a(14) =423429014908

External references