%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