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%I #6 Jun 15 2020 13:58:19
%S 0,1,1,4,32,963,44186,9994726,4485120457,6962969227448
%N Number of n X n 0..1 arrays with every element equal to 3, 4, 5, 6 or 8 king-move adjacent elements, with upper left element zero.
%C Diagonal of A298902.
%e Some solutions for n=5
%e ..0..0..1..1..1. .0..0..1..1..1. .0..0..0..1..1. .0..0..0..1..1
%e ..0..0..1..1..1. .0..0..1..1..1. .0..0..0..1..1. .0..0..0..1..1
%e ..0..1..1..1..1. .1..1..1..1..1. .1..1..0..1..1. .1..1..1..0..0
%e ..0..0..1..1..1. .1..1..1..0..0. .1..1..0..0..0. .1..1..1..0..0
%e ..0..0..1..1..1. .1..1..1..0..0. .1..1..0..0..0. .1..1..1..0..0
%Y Cf. A298902.
%K nonn
%O 1,4
%A _R. H. Hardin_, Jan 28 2018