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Number of (n+4)X(n+4) binary arrays with every 1 having exactly three king-move neighbors equal to 1 but with no 2X2 blocks of 1s
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%I #5 Mar 31 2012 12:35:51

%S 1,3,32,199,8702,248303,15282749,2019698992,349874591303

%N Number of (n+4)X(n+4) binary arrays with every 1 having exactly three king-move neighbors equal to 1 but with no 2X2 blocks of 1s

%C Diagonal of A183465

%e Some solutions for 7X7

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

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

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

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

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

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

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

%K nonn

%O 1,2

%A _R. H. Hardin_ Jan 05 2011