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%I #6 Jun 15 2020 11:20:51
%S 0,4,0,83,1893,32834,10823065,4673855921,3376311711594
%N Number of n X n 0..1 arrays with every element equal to 1, 3, 4, 5 or 7 king-move adjacent elements, with upper left element zero.
%C Diagonal of A298622.
%e Some solutions for n=5
%e ..0..0..0..1..1. .0..1..0..0..0. .0..0..0..1..1. .0..0..0..0..0
%e ..0..0..0..1..1. .0..1..0..0..0. .0..0..0..1..1. .1..1..0..0..0
%e ..0..0..1..0..1. .1..1..1..0..0. .0..0..1..0..0. .1..1..1..0..0
%e ..1..0..1..1..1. .1..0..1..1..1. .0..1..1..0..0. .0..0..1..1..1
%e ..0..1..1..1..1. .0..1..1..0..0. .0..1..1..0..0. .1..1..1..0..0
%Y Cf. A298622.
%K nonn
%O 1,2
%A _R. H. Hardin_, Jan 23 2018