A205421 - OEIS

%I #4 Mar 31 2012 12:37:06

%S 3855292,782598960,189526149374,42562692150766,9958775794360374

%N Number of (n+1)X6 0..3 arrays with the number of rightwards and downwards edge increases in each 2X2 subblock differing from the number in all its horizontal and vertical neighbors

%C Column 5 of A205422

%e Some solutions for n=4

%e ..0..2..0..1..0..3....1..2..1..0..2..1....3..3..1..3..2..2....2..0..2..2..1..2

%e ..2..2..1..2..1..2....1..2..2..1..2..1....1..1..2..3..0..1....0..0..1..0..2..3

%e ..3..2..0..3..0..1....2..3..3..0..2..2....3..1..3..1..1..3....0..1..3..2..3..0

%e ..1..3..0..1..0..2....3..2..0..1..3..3....3..0..2..1..2..3....0..0..1..0..1..0

%e ..1..1..0..2..0..1....2..0..1..2..0..1....2..2..3..2..3..3....3..3..2..0..2..0

%K nonn

%O 1,1

%A _R. H. Hardin_ Jan 27 2012