Number of (n+1) X (1+1) 0..2 arrays with nondecreasing min(x(i,j),x(i,j-1)) in the i direction and nondecreasing absolute value of x(i,j)-x(i-1,j) in the j direction.
A250987
Number of (n+1) X (1+1) 0..2 arrays with nondecreasing min(x(i,j),x(i,j-1)) in the i direction and nondecreasing absolute value of x(i,j)-x(i-1,j) in the j direction.
Terms
- a(0) =40a(1) =158a(2) =612a(3) =2323a(4) =8726a(5) =32554a(6) =120930a(7) =447985a(8) =1656600a(9) =6118822a(10) =22583412a(11) =83309947a(12) =307230262a(13) =1132763986a(14) =4175945922a(15) =15393274457a(16) =56738968328a(17) =209129360814a(18) =770792626564
External references
- oeis: A250987