%I #6 May 03 2020 15:43:23
%S 0,1,0,3,5,847,16212,6915147,2015018055,4040561643423
%N Number of n X n 0..1 arrays with every element equal to 3, 4, 5 or 6 king-move adjacent elements, with upper left element zero.
%C Diagonal of A298100.
%e Some solutions for n=7
%e ..0..0..0..1..1..0..0. .0..0..0..1..1..0..0. .0..0..1..1..1..0..0
%e ..0..0..0..1..1..0..0. .0..0..0..1..1..0..0. .0..0..1..1..1..0..0
%e ..1..1..0..1..1..0..0. .1..1..0..0..0..0..0. .0..0..0..0..0..0..0
%e ..1..1..0..0..1..1..1. .1..1..0..0..0..1..1. .0..0..1..0..0..1..1
%e ..1..1..1..0..0..1..1. .1..1..1..1..1..1..1. .0..1..1..1..1..1..1
%e ..0..0..1..1..1..0..0. .0..0..1..0..0..1..1. .0..0..1..1..0..0..0
%e ..0..0..1..1..1..0..0. .0..0..0..0..0..1..1. .0..0..0..0..0..0..0
%Y Cf. A298100.
%K nonn
%O 1,4
%A _R. H. Hardin_, Jan 12 2018
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