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%I #5 Dec 01 2014 11:26:31
%S 9,71,822,18924,577942,39473392,3232216177,648994836940,
%T 144605658061843,84335072845188126,51747558531570898082,
%U 86717653225766506442744,147921009780997938189659172,706047665638030677246299851962
%N Number of (n+1)X(n+1) 0..1 arrays with every 2X2 subblock having a single 1 or two 1s on the same edge or main diagonally
%C Diagonal of A251292
%H R. H. Hardin, <a href="/A251284/b251284.txt">Table of n, a(n) for n = 1..16</a>
%e Some solutions for n=4
%e ..0..1..0..1..0....0..1..0..1..0....0..1..1..0..0....0..1..1..0..0
%e ..0..0..0..0..0....0..0..0..0..0....0..0..0..0..1....0..0..0..0..1
%e ..1..1..0..1..1....0..1..1..0..1....1..0..1..0..0....0..1..1..0..0
%e ..0..0..0..0..0....0..0..0..0..0....1..0..0..0..1....0..0..0..0..1
%e ..1..0..1..1..1....0..1..1..1..0....0..0..1..0..1....1..0..1..0..0
%K nonn
%O 1,1
%A _R. H. Hardin_, Dec 01 2014
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