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%I #7 Apr 19 2020 23:55:56
%S 1,7,117,3808,484808,200646607,197589351469,578079526400673,
%T 5377924483062338484,139752957415982420114129,
%U 10302206214700301342887034910,2267938084956284272782357464419480
%N Number of n X n 0..1 arrays with every 1 horizontally or antidiagonally adjacent to 1 or 2 neighboring 1's.
%C Diagonal of A297314.
%H R. H. Hardin, <a href="/A297308/b297308.txt">Table of n, a(n) for n = 1..17</a>
%e Some solutions for n=5
%e ..0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..0. .0..1..0..1..1
%e ..0..1..1..0..0. .1..1..0..0..0. .0..0..0..0..0. .1..1..0..1..1
%e ..0..0..0..1..0. .0..1..0..0..0. .1..1..0..0..0. .1..1..0..0..0
%e ..0..0..1..0..0. .1..0..0..1..1. .0..1..1..0..0. .1..1..0..0..0
%e ..0..0..0..1..1. .0..0..0..0..0. .0..1..1..0..0. .1..0..0..1..1
%Y Cf. A297314.
%K nonn
%O 1,2
%A _R. H. Hardin_, Dec 28 2017
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