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

A250708

Number of (1+1)X(n+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) =654a(2) =3674a(3) =19876a(4) =102963a(5) =521684a(6) =2597784a(7) =12791393a(8) =62471749a(9) =303365393a(10) =1467083010a(11) =7073825450a(12) =34034432454a(13) =163494484120a(14) =784498580843

External references