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%I #6 Aug 20 2020 11:43:24
%S 0,1,3,78,4857,885003,528025038,956047339302,5338842851150762,
%T 91544753173766016191,4821728266187979354515714
%N Number of n X n 0..1 arrays with every element equal to 2, 3, 4, 5 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
%C Diagonal of A301400.
%e Some solutions for n=5
%e ..0..0..1..1..0. .0..0..0..0..0. .0..0..0..0..1. .0..0..0..1..1
%e ..0..1..1..0..0. .0..0..1..0..0. .0..0..0..1..1. .0..0..1..1..1
%e ..0..1..1..0..1. .0..1..1..0..1. .0..0..0..1..1. .1..1..0..1..1
%e ..0..0..1..1..1. .0..0..0..1..1. .0..1..0..0..0. .1..0..0..1..1
%e ..0..0..1..1..1. .0..0..1..1..1. .1..1..0..0..0. .1..1..1..1..1
%Y Cf. A301400.
%K nonn
%O 1,3
%A _R. H. Hardin_, Mar 20 2018
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