%I #6 May 03 2020 15:36:17
%S 1,2,17,93,2719,65215,6241242,959915987,322119198752,199728169017008
%N Number of n X n 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 2 or 4 neighboring 1's.
%C Diagonal of A297733.
%e Some solutions for n=6
%e ..0..0..1..1..1..0. .0..0..1..0..1..0. .1..1..0..1..1..1. .0..1..1..0..0..0
%e ..1..1..0..0..0..1. .0..1..1..1..0..1. .1..1..0..0..1..0. .1..0..0..1..1..1
%e ..1..1..1..0..1..1. .0..0..0..0..1..0. .0..0..0..1..0..1. .0..1..1..0..1..0
%e ..1..0..0..0..1..0. .1..1..0..1..0..1. .1..1..0..0..1..0. .1..1..1..1..0..1
%e ..0..1..1..0..0..1. .1..1..0..0..1..1. .1..1..0..1..0..1. .1..0..0..1..1..1
%e ..0..0..0..1..1..0. .0..0..0..0..1..1. .0..0..0..0..1..0. .0..1..1..0..1..0
%Y Cf. A297733.
%K nonn
%O 1,2
%A _R. H. Hardin_, Jan 04 2018
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