Number of (n+1)X(2+1) 0..3 arrays with nondecreasing 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.
A250685
Number of (n+1)X(2+1) 0..3 arrays with nondecreasing 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) =543a(1) =2920a(2) =15246a(3) =76320a(4) =362241a(5) =1647460a(6) =7249825a(7) =31113316a(8) =131014715a(9) =543845812a(10) =2233368847a(11) =9098214240a(12) =36844025643a(13) =148553970588a(14) =597082293823
External references
- oeis: A250685