Number of (n+1)X(2+1) 0..3 arrays with nondecreasing x(i,j)-x(i,j-1) in the i direction and nondecreasing x(i,j)-x(i-1,j) in the j direction.
A250538
Number of (n+1)X(2+1) 0..3 arrays with nondecreasing x(i,j)-x(i,j-1) in the i direction and nondecreasing x(i,j)-x(i-1,j) in the j direction.
Terms
- a(0) =1080a(1) =10704a(2) =79366a(3) =491650a(4) =2701872a(5) =13657024a(6) =64993652a(7) =295871112a(8) =1302924116a(9) =5595784456a(10) =23580939154a(11) =97951328382a(12) =402468021792
External references
- oeis: A250538