%I #4 Aug 05 2018 15:54:49
%S 0,1,1,4,14,22,274,676,3242,11126,82244,533332,3119164,25366420,
%T 294184154,2840519658,33041657228,516226778736,8641833554020
%N Number of nXn 0..1 arrays with every element unequal to 2 or 3 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
%C Diagonal of A317741.
%e Some solutions for n=5
%e ..0..1..0..1..0. .0..1..0..1..0. .0..1..0..1..0. .0..1..0..0..1
%e ..1..0..0..1..0. .1..0..0..1..0. .1..0..0..1..0. .1..1..1..1..0
%e ..0..0..1..1..0. .1..0..1..1..0. .1..0..1..1..0. .0..1..1..0..1
%e ..1..1..1..1..1. .0..0..1..1..0. .0..1..1..1..1. .0..1..0..0..1
%e ..0..0..0..1..0. .1..0..1..0..1. .1..0..0..1..0. .0..1..0..1..0
%Y Cf. A317741.
%K nonn
%O 1,4
%A _R. H. Hardin_, Aug 05 2018