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A300315 Number of n X n 0..1 arrays with every element equal to 0, 1, 3, 4, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero. 0

%I #6 Jun 15 2020 15:10:02

%S 1,4,16,735,31345,8002885,7221094975,16292595627604,134432669552429280

%N Number of n X n 0..1 arrays with every element equal to 0, 1, 3, 4, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero.

%C Diagonal of A300321.

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A300321.

%K nonn

%O 1,2

%A _R. H. Hardin_, Mar 02 2018

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Last modified March 28 13:25 EDT 2024. Contains 371254 sequences. (Running on oeis4.)