Number of (n+1) X (4+1) 0..1 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.
A250793
Number of (n+1) X (4+1) 0..1 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) =118a(1) =376a(2) =1190a(3) =3776a(4) =12062a(5) =38676a(6) =124366a(7) =400616a(8) =1292134a(9) =4171276a(10) =13474406a(11) =43546448a(12) =140781326a(13) =455247108a(14) =1472416318a(15) =4762930232a(16) =15408574198a(17) =49852141564a(18) =161298304598a(19) =521908159904
External references
- oeis: A250793