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 A303881 Number of nXn 0..1 arrays with every element unequal to 0, 2, 3 or 4 king-move adjacent elements, with upper left element zero. 0

%I

%S 1,4,11,166,1150,24985,308271,7577931,148783767,4946437814,

%T 177760275047

%N Number of nXn 0..1 arrays with every element unequal to 0, 2, 3 or 4 king-move adjacent elements, with upper left element zero.

%C Diagonal of A303888.

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A303888.

%K nonn

%O 1,2

%A _R. H. Hardin_, May 02 2018

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Last modified May 31 02:51 EDT 2020. Contains 334747 sequences. (Running on oeis4.)