Number of (6+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.

A250638

Number of (6+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) =7307a(1) =53847a(2) =381834a(3) =2290189a(4) =12291286a(5) =60472234a(6) =280151655a(7) =1237636447a(8) =5285753380a(9) =21946694869a(10) =89235599813a(11) =356402744473

External references