T(n,k)=Number of (n+1)X(k+1) 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.
A203870
T(n,k)=Number of (n+1)X(k+1) 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) =205a(1) =1648a(2) =1648a(3) =10077a(4) =21635a(5) =10077a(6) =55848a(7) =210190a(8) =210190a(9) =55848a(10) =280509a(11) =1605552a(12) =2935262a(13) =1605552a(14) =280509a(15) =1322098a(16) =10500903a(17) =31521422a(18) =31521422a(19) =10500903a(20) =1322098a(21) =5914273a(22) =59962757a(23) =269967062a(24) =443416660a(25) =269967062
External references
- oeis: A203870