%I #6 May 23 2020 04:38:19
%S 0,1,8,219,35980,19100497,39291988976,290849365371077,
%T 7804886774633048676
%N Number of n X n 0..1 arrays with every element equal to 2, 3, 4, 5 or 6 king-move adjacent elements, with upper left element zero.
%C Diagonal of A298461.
%e Some solutions for n=5
%e ..0..0..1..1..1. .0..0..0..1..1. .0..0..1..1..0. .0..0..0..0..0
%e ..0..1..0..0..1. .0..1..1..0..1. .0..1..1..0..0. .1..0..1..1..0
%e ..0..1..1..0..1. .1..0..1..1..0. .1..1..0..1..0. .1..1..1..1..0
%e ..1..0..1..1..0. .1..0..0..0..1. .0..0..1..1..1. .0..0..1..0..0
%e ..1..1..0..0..0. .1..1..1..1..1. .0..1..1..1..1. .0..1..1..1..0
%Y Cf. A298461.
%K nonn
%O 1,3
%A _R. H. Hardin_, Jan 19 2018
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