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A304670 Number of n X n 0..1 arrays with every element unequal to 0, 2, 3, 5 or 6 king-move adjacent elements, with upper left element zero. 0

%I #6 Oct 20 2020 19:26:05

%S 1,4,13,56,897,20932,930123,73484449,11082127004,2811843090472

%N Number of n X n 0..1 arrays with every element unequal to 0, 2, 3, 5 or 6 king-move adjacent elements, with upper left element zero.

%C Diagonal of A304676.

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A304676.

%K nonn

%O 1,2

%A _R. H. Hardin_, May 16 2018

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Last modified June 21 14:49 EDT 2024. Contains 373548 sequences. (Running on oeis4.)