Number of (n+1) X (4+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.

A250849

Number of (n+1) X (4+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) =3136a(1) =21436a(2) =123016a(3) =626416a(4) =2955136a(5) =13263136a(6) =57570016a(7) =244213216a(8) =1019415136a(9) =4206874336a(10) =17218194016a(11) =70050978016a(12) =283750743136

External references