A186590 - OEIS

%I #5 Mar 31 2012 12:36:05

%S 4294967296,2703,33006,2526165,11494293,16898709,17395749,20385141,

%T 27395301,42268437,70928997,139324629,471686661,1278076821,2789296725

%N Number of (n+3)X(n+3) 0..3 arrays with every 4X4 subblock commuting with each horizontal and vertical neighbor 4X4 subblock

%C Diagonal of A186599

%e Some solutions for 5X5

%e ..0..0..0..0..0....0..0..0..0..0....0..0..0..0..0....0..0..0..3..3

%e ..2..0..0..0..0....0..0..0..0..0....0..0..0..0..0....0..0..0..0..2

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Feb 24 2011