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%I #6 Jun 15 2020 13:57:43
%S 0,1,1,11,219,2963,74725,5719782,724538480,145951109194
%N Number of n X n 0..1 arrays with every element equal to 2, 3, 5, 6 or 8 king-move adjacent elements, with upper left element zero.
%C Diagonal of A298895.
%e Some solutions for n=7
%e ..0..0..0..0..1..1..1. .0..0..0..1..1..1..0. .0..0..1..0..0..1..1
%e ..0..1..1..0..1..1..1. .0..1..1..0..1..0..0. .1..0..1..1..0..0..1
%e ..1..0..1..1..1..0..0. .1..0..0..1..1..1..0. .1..1..0..0..0..0..0
%e ..1..0..0..0..1..1..0. .1..0..1..1..1..1..1. .0..0..0..0..1..1..0
%e ..1..0..1..0..0..0..1. .0..1..1..1..0..0..1. .0..0..0..1..0..1..0
%e ..1..0..1..1..1..1..0. .1..0..1..0..1..1..0. .0..0..0..1..0..0..1
%e ..1..1..0..0..0..0..0. .1..1..0..1..0..0..0. .0..0..0..1..1..1..1
%Y Cf. A298895.
%K nonn
%O 1,4
%A _R. H. Hardin_, Jan 28 2018