A301355 - OEIS

%I #6 Aug 20 2020 11:43:04

%S 0,2,13,101,1356,44148,3241470,456790733,132506438551,79120923192740

%N Number of n X n 0..1 arrays with every element equal to 1, 2, 4, 5 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

%C Diagonal of A301361.

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A301361.

%K nonn

%O 1,2

%A _R. H. Hardin_, Mar 19 2018