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.

A250703

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) =19876a(1) =253578a(2) =2492054a(3) =19962956a(4) =133888216a(5) =770143684a(6) =3888150856a(7) =17539038598a(8) =71841461103a(9) =270529260362a(10) =946729871276

External references