Number of nX6 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, no adjacent elements equal, and upper left element zero.
A231061
Number of nX6 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, no adjacent elements equal, and upper left element zero.
Terms
- a(0) =0a(1) =230a(2) =7818a(3) =313944a(4) =12582344a(5) =505135612a(6) =20286249268a(7) =814871303100
External references
- oeis: A231061