Number of nX4 0..3 arrays x(i,j) with each element horizontally or vertically 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, and upper left element zero.
A230802
Number of nX4 0..3 arrays x(i,j) with each element horizontally or vertically 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, and upper left element zero.
Terms
- a(0) =0a(1) =16a(2) =40a(3) =1370a(4) =10448a(5) =183088a(6) =2045378a(7) =29175688a(8) =365502344a(9) =4913369536a(10) =63632416648a(11) =840894973402
External references
- oeis: A230802