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A278202
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Number of n X n 0..1 arrays with every element both equal and not equal to some elements at offset (-1,-1), (-1,0), (-1,1), (0,-1), (0,1), (1,-1), (1,0) or (1,1), with upper left element zero.
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%I #6 Apr 21 2020 12:50:46
%S 0,3,97,8242,3295771,5306819216,33056811286568,812312404546266967,
%T 78877646007318566942149,30229204386668969418436705255,
%U 45720403850059908972915757270717926
%N Number of n X n 0..1 arrays with every element both equal and not equal to some elements at offset (-1,-1), (-1,0), (-1,1), (0,-1), (0,1), (1,-1), (1,0) or (1,1), with upper left element zero.
%C Diagonal of A278208.
%e Some solutions for n=4
%e ..0..1..1..1. .0..1..0..0. .0..0..1..1. .0..1..0..0. .0..1..0..1
%e ..0..1..0..0. .1..0..1..1. .0..1..0..0. .0..1..1..1. .0..1..1..0
%e ..1..0..0..0. .1..1..0..1. .1..1..1..1. .0..1..0..1. .1..1..1..1
%e ..1..1..1..0. .0..0..0..0. .1..0..0..0. .0..1..1..0. .1..0..0..1
%Y Cf. A278208.
%K nonn
%O 1,2
%A _R. H. Hardin_, Nov 15 2016
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