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%I #6 Jun 15 2020 11:27:56
%S 0,4,1,68,1590,16551,5097700,2031564141,1185589525594
%N Number of n X n 0..1 arrays with every element equal to 1, 3, 4, 5 or 8 king-move adjacent elements, with upper left element zero.
%C Diagonal of A298834.
%e Some solutions for n=5
%e ..0..0..1..0..0. .0..0..0..1..0. .0..1..0..0..0. .0..0..1..1..1
%e ..1..1..1..1..1. .0..0..0..1..0. .0..1..0..0..0. .0..0..1..1..1
%e ..1..1..0..0..0. .0..0..0..1..1. .1..1..0..0..0. .0..0..1..1..1
%e ..0..1..0..0..0. .0..0..0..1..1. .0..1..1..1..1. .1..0..0..0..0
%e ..0..1..0..0..0. .0..0..0..1..1. .1..0..1..0..0. .0..1..0..1..1
%Y Cf. A298834.
%K nonn
%O 1,2
%A _R. H. Hardin_, Jan 27 2018
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