Number of (1+1) X (n+1) 0..2 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.

A250633

Number of (1+1) X (n+1) 0..2 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) =36a(1) =154a(2) =585a(3) =2183a(4) =7924a(5) =28456a(6) =101308a(7) =358990a(8) =1268051a(9) =4470464a(10) =15740673a(11) =55379788a(12) =194741827a(13) =684584785a(14) =2406055663a(15) =8455258981a(16) =29710611016a(17) =104393359779a(18) =366791460582

External references