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%I #5 Mar 31 2012 12:36:06
%S 246,29020,13066921,22495797451,147985903265501,3720538199779806652,
%T 357466055151669297136736,131253399322834546449506492207
%N Half the number of (n+2)X(n+2) binary arrays with each 3X3 subblock having a sum in 2..7
%C Diagonal of A186796
%e Some solutions for 4X4 with a(1,1)=0
%e ..0..0..1..0....0..1..0..0....0..0..0..1....0..1..1..0....0..1..1..1
%e ..0..1..1..1....0..0..0..0....1..0..0..1....0..1..0..1....1..1..0..1
%e ..0..0..1..0....1..0..1..1....0..1..0..0....0..0..0..1....1..0..0..0
%e ..1..1..0..0....1..0..1..1....1..1..0..0....0..0..1..1....1..0..0..0
%K nonn
%O 1,1
%A _R. H. Hardin_ Feb 26 2011
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