A260919 - OEIS

%I #5 Aug 04 2015 07:32:55

%S 36,68,401,2208,11608,81848,971381,10662976,181422568,3460352248,

%T 98952552192,2935432680396,136085020244379,6702623882827610,

%U 502445435345158337,39885899773762437744,4881874517425716225227

%N Number of (n+2)X(n+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00010101 00101011 or 01010101

%C Diagonal of A260927

%H R. H. Hardin, <a href="/A260919/b260919.txt">Table of n, a(n) for n = 1..24</a>

%e Some solutions for n=4

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

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

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

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

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

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

%Y Cf. A260927

%K nonn

%O 1,1

%A _R. H. Hardin_, Aug 04 2015