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A300459 Number of n X n 0..1 arrays with every element equal to 2, 3 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. 0

%I

%S 0,1,2,28,1146,78195,17675111,9829599051,14061129641181,

%T 51771244646074395

%N Number of n X n 0..1 arrays with every element equal to 2, 3 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

%C Diagonal of A300465.

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A300465.

%K nonn,changed

%O 1,3

%A _R. H. Hardin_, Mar 06 2018

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Last modified July 5 03:37 EDT 2020. Contains 335459 sequences. (Running on oeis4.)