Number of (n+1) X 3 0..4 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) nondecreasing in column and row directions, respectively.
A203864
Number of (n+1) X 3 0..4 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) nondecreasing in column and row directions, respectively.
Terms
- a(0) =1648a(1) =21635a(2) =210190a(3) =1605552a(4) =10500903a(5) =59962757a(6) =309154358a(7) =1459797487a(8) =6416948063a(9) =26519347624a(10) =104007127796a(11) =389733297547
External references
- oeis: A203864