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%I #6 Sep 16 2020 19:11:17
%S 1,5,9,44,176,651,2945,14708,79188,495071,3628565,29134749,265855219,
%T 2732640025,30998016185,398665350465
%N Number of n X n 0..1 arrays with every element unequal to 0, 1, 3 or 6 king-move adjacent elements, with upper left element zero.
%C Diagonal of A304133.
%e Some solutions for n=5
%e ..0..1..1..1..0. .0..1..1..0..0. .0..0..0..0..0. .0..1..1..1..0
%e ..1..1..1..1..1. .1..1..1..1..0. .0..0..0..0..1. .1..1..1..1..1
%e ..1..1..1..0..0. .1..1..1..1..1. .0..0..0..1..1. .1..1..1..1..1
%e ..1..1..1..1..0. .0..1..1..1..1. .0..0..0..0..0. .0..1..1..1..1
%e ..1..1..1..1..1. .0..0..1..1..0. .1..0..0..0..1. .0..0..1..1..0
%Y Cf. A304133.
%K nonn
%O 1,2
%A _R. H. Hardin_, May 07 2018
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