Number of (n+1) X (7+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.
A250811
Number of (n+1) X (7+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) =2025a(1) =8049a(2) =29145a(3) =98481a(4) =318585a(5) =1003089a(6) =3104985a(7) =9507441a(8) =28908345a(9) =87498129a(10) =264041625a(11) =795220401a(12) =2391853305a(13) =7187945169a(14) =21588607065a(15) =64815365361a(16) =194545185465a(17) =583833736209
External references
- oeis: A250811