%I #6 Apr 26 2020 21:01:20
%S 1,3,16,126,2104,78660,5705431,820373528,239372827502,141301759543525,
%T 168080053760638246,403684916425998696873
%N Number of n X n 0..1 arrays with each 1 horizontally, vertically or antidiagonally adjacent to 2 or 4 neighboring 1's.
%C Diagonal of A296541.
%e Some solutions for n=6
%e ..0..1..0..0..0..0. .0..0..0..1..0..0. .0..0..0..1..1..0. .0..1..1..1..1..0
%e ..1..1..0..1..1..0. .0..1..1..1..0..0. .0..0..1..0..1..0. .1..0..0..0..1..0
%e ..0..0..1..0..1..0. .0..1..0..0..0..0. .0..1..0..0..1..0. .1..1..1..1..0..0
%e ..0..1..0..0..1..0. .1..1..0..1..0..0. .0..1..0..0..1..1. .0..0..0..0..0..0
%e ..1..0..1..1..0..0. .0..0..1..1..0..0. .1..0..0..0..0..1. .0..0..0..0..0..0
%e ..1..1..0..0..0..0. .0..0..0..0..0..0. .1..1..1..1..1..0. .0..0..0..0..0..0
%Y Cf. A296541.
%K nonn
%O 1,2
%A _R. H. Hardin_, Dec 15 2017
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