Number of nX6 0..3 arrays x(i,j) with each element horizontally, vertically or antidiagonally next to at least one element with value (x(i,j)+1) mod 4 and at least one element with value (x(i,j)-1) mod 4, no adjacent elements equal, and upper left element zero.
A230829
Number of nX6 0..3 arrays x(i,j) with each element horizontally, vertically or antidiagonally next to at least one element with value (x(i,j)+1) mod 4 and at least one element with value (x(i,j)-1) mod 4, no adjacent elements equal, and upper left element zero.
Terms
- a(0) =0a(1) =44a(2) =130a(3) =734a(4) =4350a(5) =29446a(6) =201592a(7) =1388526a(8) =9649244a(9) =67351066a(10) =471449136a(11) =3305467604a(12) =23199674400a(13) =162919918906
External references
- oeis: A230829