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%I #7 Aug 20 2020 11:36:28
%S 0,3,53,2347,263468,77669371,59556673490,118646962163280,
%T 613557423442676836,8242700694825663880442
%N Number of n X n 0..1 arrays with every element equal to 1, 2, 3 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
%C Diagonal of A300612.
%e Some solutions for n=5
%e ..0..0..0..0..1. .0..0..0..1..1. .0..0..0..1..0. .0..0..0..1..1
%e ..1..1..0..1..0. .0..1..1..0..1. .0..1..1..1..0. .1..0..1..0..0
%e ..0..1..1..0..0. .1..0..0..1..0. .0..0..0..1..1. .1..0..0..1..1
%e ..0..0..1..0..1. .1..1..0..1..0. .0..1..1..0..0. .0..1..0..0..0
%e ..0..1..0..1..1. .1..1..0..1..0. .1..1..0..1..1. .0..1..1..1..0
%Y Cf. A300612.
%K nonn
%O 1,2
%A _R. H. Hardin_, Mar 09 2018
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