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%I #5 Mar 31 2012 12:36:47
%S 34,356,7209,259651,17439289,2189182446,507851160543,218307429573974,
%T 174227993366338844,257822582804511694491,707314015481240313274351,
%U 3598905005467537466992859137,33959215254291376990195684315384
%N Number of (n+2)X(n+2) binary arrays with no more than one of any consecutive three bits set in any row or column
%C Diagonal of A202421
%e Some solutions for n=3
%e ..0..0..0..1..0....1..0..0..0..0....1..0..0..0..1....0..0..0..0..1
%e ..0..0..0..0..1....0..0..1..0..0....0..1..0..0..0....1..0..0..1..0
%e ..0..0..1..0..0....0..0..0..0..0....0..0..1..0..0....0..1..0..0..0
%e ..0..0..0..1..0....0..0..0..0..1....0..0..0..0..1....0..0..1..0..0
%e ..0..0..0..0..0....1..0..0..1..0....0..0..0..1..0....1..0..0..0..1
%K nonn
%O 1,1
%A _R. H. Hardin_ Dec 19 2011
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