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A303320 Number of nXn 0..1 arrays with every element equal to 0, 2, 4, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero. 0

%I

%S 1,2,4,2,64,56,2956,24759,3531980,122180446,68902353881

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

%C Diagonal of A303325.

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A303325.

%K nonn

%O 1,2

%A _R. H. Hardin_, Apr 21 2018

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Last modified August 4 20:00 EDT 2020. Contains 336202 sequences. (Running on oeis4.)