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%I #6 Sep 16 2020 19:13:56
%S 1,8,77,1137,26548,989406,55773947,4882896349,654105710575
%N Number of n X n 0..1 arrays with every element unequal to 0, 1, 2, 3 or 5 king-move adjacent elements, with upper left element zero.
%C Diagonal of A304310.
%e Some solutions for n=5
%e ..0..0..1..1..1. .0..1..1..0..0. .0..1..0..0..0. .0..0..0..1..1
%e ..0..1..1..1..0. .0..1..1..1..0. .1..1..0..0..1. .0..0..1..1..1
%e ..1..1..1..1..1. .0..1..1..0..0. .1..0..0..0..0. .0..1..1..1..1
%e ..0..1..1..0..0. .0..0..0..1..1. .0..0..0..1..1. .1..1..1..1..1
%e ..0..0..1..0..0. .0..0..0..0..1. .1..0..1..1..0. .1..1..1..1..0
%Y Cf. A304310.
%K nonn
%O 1,2
%A _R. H. Hardin_, May 10 2018