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Number of (n+2)X(n+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000011 or 00001011
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%I #4 Jul 27 2015 08:30:58

%S 48,136,868,3603,5848,31078,155232,356236,1433220,8676027,28104408,

%T 96675895,569988256,2581001066,9580891800,49283809387,267771460624

%N Number of (n+2)X(n+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000011 or 00001011

%C Diagonal of A260501

%e Some solutions for n=4

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

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

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

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

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

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

%Y Cf. A260501

%K nonn

%O 1,1

%A _R. H. Hardin_, Jul 27 2015