A302814 - OEIS

%I #6 Sep 16 2020 18:59:28

%S 1,8,75,1494,57684,5520999,1135257814,402121386052,303834035008015

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

%C Diagonal of A302820.

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A302820.

%K nonn

%O 1,2

%A _R. H. Hardin_, Apr 13 2018