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%I #4 Jul 28 2015 19:22:53
%S 40,131,774,2775,9184,50674,219852,991164,6265304,31978322,161993488,
%T 1205560940,7787001888,46339128440,362482299512,2995644789618
%N Number of (n+2)X(n+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000011 or 00010001
%C Diagonal of A260544
%e Some solutions for n=4
%e ..0..0..0..0..1..0....1..0..0..0..0..1....1..0..0..0..0..1....0..0..0..1..1..0
%e ..0..0..0..0..0..0....0..0..0..0..0..0....0..1..0..0..1..0....0..0..0..0..0..0
%e ..0..1..1..0..0..0....0..0..0..1..0..0....0..0..0..0..0..0....1..1..0..0..0..0
%e ..0..0..0..0..0..1....1..0..0..1..0..0....0..0..0..0..0..0....0..0..0..0..1..0
%e ..0..0..0..0..0..0....1..0..0..0..0..0....0..1..0..0..1..0....0..0..0..0..1..0
%e ..0..1..1..0..0..0....0..0..0..0..0..1....1..1..0..0..1..1....1..1..0..0..0..0
%Y Cf. A260544
%K nonn
%O 1,1
%A _R. H. Hardin_, Jul 28 2015
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