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A318076 Number of nXn 0..1 arrays with every element unequal to 0, 1, 3 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. 0

%I #4 Aug 15 2018 13:24:13

%S 1,3,5,22,51,314,1851,15876,139346,1719340,26691372,570681324

%N Number of nXn 0..1 arrays with every element unequal to 0, 1, 3 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

%C Diagonal of A318082.

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A318082.

%K nonn

%O 1,2

%A _R. H. Hardin_, Aug 15 2018

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Last modified August 22 23:56 EDT 2024. Contains 375369 sequences. (Running on oeis4.)