Number of (n+1)X3 0..3 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.
A203735
Number of (n+1)X3 0..3 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) =499a(1) =3912a(2) =23442a(3) =114276a(4) =488745a(5) =1868452a(6) =6571172a(7) =21530128a(8) =66630375a(9) =196405354a(10) =555736019a(11) =1517903362a(12) =4021656843a(13) =10375637542a(14) =26152033020a(15) =64573262520a(16) =156555567431a(17) =373428801166a(18) =877831497249
External references
- oeis: A203735