A303176 - OEIS

A303176

Number of n X n 0..1 arrays with every element equal to 0, 1, 2, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

%I #6 Sep 16 2020 19:03:11

%S 1,8,31,297,5613,218980,11901719,1341217380,375045359077,

%T 204902495620748,208094348433251495

%N Number of n X n 0..1 arrays with every element equal to 0, 1, 2, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

%C Diagonal of A303182.

%e Some solutions for n=5

%e ..0..1..0..1..0. .0..0..1..0..1. .0..1..0..1..1. .0..0..1..0..1

%e ..0..1..0..1..0. .0..1..1..0..1. .0..1..0..1..0. .1..1..1..1..0

%e ..0..1..0..1..0. .0..1..0..0..1. .0..1..0..1..0. .1..0..1..0..1

%e ..0..1..0..0..1. .1..1..0..1..1. .0..1..1..1..0. .1..0..1..0..0

%e ..0..1..0..1..0. .1..0..0..1..0. .1..0..0..1..1. .1..0..1..1..0

%Y Cf. A303182.

%K nonn

%O 1,2

%A _R. H. Hardin_, Apr 19 2018