A278202 - OEIS

A278202

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.

%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