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 A301485 Number of n X n 0..1 arrays with every element equal to 0, 1, 2, 4, 5 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. 0

%I

%S 1,7,52,599,15124,903707,116648010,34593556316,23228787136780,

%T 34303673074888666

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

%C Diagonal of A301491.

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A301491.

%K nonn

%O 1,2

%A _R. H. Hardin_, Mar 22 2018

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Last modified September 23 16:41 EDT 2020. Contains 337315 sequences. (Running on oeis4.)