A282784 - OEIS

A282784

Number of n X n 0..1 arrays with no 1 equal to more than one of its king-move neighbors, with the exception of exactly one element.

%I #6 Apr 26 2020 20:39:17

%S 0,0,73,1952,208559,34974844,12713143876,10031326473244,

%T 16844842566734425,61957626701788646084,497581272671041376917187

%N Number of n X n 0..1 arrays with no 1 equal to more than one of its king-move neighbors, with the exception of exactly one element.

%C Diagonal of A282791.

%e Some solutions for n=4

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

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

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

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

%Y Cf. A282791.

%K nonn

%O 1,3

%A _R. H. Hardin_, Feb 21 2017