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A297900 Number of n X n 0..1 arrays with every element equal to 0, 1, 3 or 4 king-move adjacent elements, with upper left element zero. 0

%I #6 May 03 2020 15:39:40

%S 1,4,1,37,281,257,23911,1367645,10485521,4553534006

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

%C Diagonal of A297907.

%e Some solutions for n=7

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

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

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

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

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

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

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

%Y Cf. A297907.

%K nonn

%O 1,2

%A _R. H. Hardin_, Jan 08 2018

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Last modified June 22 07:39 EDT 2024. Contains 373565 sequences. (Running on oeis4.)