A186580 - OEIS

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

%S 43046721,827,5879,163723,569947,811795,855715,1049539,1464331,

%T 2211763,3510715,6188179,16060459,36931171,74101531,139265491,

%U 305505067,600286819,1098007483

%N Number of (n+3)X(n+3) 0..2 arrays with every 4X4 subblock commuting with each horizontal and vertical neighbor 4X4 subblock

%C Diagonal of A186589

%e Some solutions for 5X5

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Feb 24 2011