Number of (n+1) X (1+1) 0..3 arrays with nondecreasing x(i,j)-x(i,j-1) in the i direction and nondecreasing min(x(i,j),x(i-1,j)) in the j direction.

A250846

Number of (n+1) X (1+1) 0..3 arrays with nondecreasing x(i,j)-x(i,j-1) in the i direction and nondecreasing min(x(i,j),x(i-1,j)) in the j direction.

Terms

    a(0) =100a(1) =543a(2) =2670a(3) =12311a(4) =54410a(5) =233683a(6) =983950a(7) =4085631a(8) =16796370a(9) =68555723a(10) =278351030a(11) =1125823351a(12) =4540620730a(13) =18274604163a(14) =73435058910a(15) =294750719471

External references