Number of (n+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.
A250805
Number of (n+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) =379a(2) =3081a(3) =20631a(4) =120304a(5) =634509a(6) =3104985a(7) =14345803a(8) =63351756a(9) =269772537a(10) =1114996177a(11) =4494912111a(12) =17741279760a(13) =68762781541a(14) =262334037201a(15) =987009622419
External references
- oeis: A250805