A224643 - OEIS

%I #4 Apr 13 2013 08:02:57

%S 512,2688,10304,31616,115328,356352,983168,3220992,9400448,25481600

%N Number of (n+2)X(n+2) 0..1 matrices with each 3X3 subblock having the same population

%C Diagonal of A224651

%e Some solutions for n=2

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Apr 13 2013