|
%I #5 Aug 17 2015 08:27:17
%S 36,41,202,1040,5633,42302,461576,5441268,87288274,1757770516,
%T 47269754142,1497418790742,65202132975489,3410709440318090,
%U 240487233522340499,20318813275802198468,2337266627779577763890
%N Number of (n+2)X(n+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00001011 00010101 or 01010101.
%C Diagonal of A261380.
%H R. H. Hardin, <a href="/A261372/b261372.txt">Table of n, a(n) for n = 1..23</a>
%e Some solutions for n=4
%e ..1..0..1..0..0..0....1..0..0..1..0..1....0..0..0..1..0..1....1..0..1..0..1..0
%e ..0..1..0..1..0..1....1..0..0..0..1..0....1..0..1..0..1..0....0..1..0..1..0..0
%e ..0..0..1..0..1..0....0..1..0..1..0..0....0..1..0..1..0..1....1..0..1..0..1..0
%e ..0..1..0..1..0..1....1..0..1..0..1..0....1..0..1..0..1..0....0..0..0..1..0..1
%e ..1..0..1..0..0..0....0..1..0..1..0..1....0..0..0..1..0..1....1..0..1..0..0..0
%e ..0..0..0..1..0..0....0..0..1..0..1..0....0..0..1..0..0..0....0..1..0..1..0..0
%Y Cf. A261380.
%K nonn
%O 1,1
%A _R. H. Hardin_, Aug 17 2015
| 