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%I #6 Jun 15 2020 14:52:11
%S 1,4,15,648,23116,5740433,4582634341,9172624830461,66764212816377961
%N Number of n X n 0..1 arrays with every element equal to 0, 1, 3, 4, 5, 6 or 7 king-move adjacent elements, with upper left element zero.
%C Diagonal of A299689.
%e Some solutions for n=5
%e ..0..0..1..1..0. .0..0..1..0..1. .0..1..1..0..0. .0..0..1..0..0
%e ..0..0..1..1..0. .0..0..0..0..0. .1..1..1..0..0. .0..0..1..0..0
%e ..1..1..0..0..0. .0..0..0..0..0. .1..1..0..1..1. .1..0..0..0..1
%e ..1..1..0..1..0. .1..0..1..1..0. .0..1..1..1..1. .0..0..1..0..0
%e ..0..0..0..0..1. .0..1..1..0..1. .0..1..1..1..0. .0..0..0..0..1
%Y Cf. A299689.
%K nonn
%O 1,2
%A _R. H. Hardin_, Feb 16 2018
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