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Number of n X n 0..1 arrays with no 1 equal to more than two of its king-move neighbors.
0

%I #6 Apr 26 2020 20:38:04

%S 2,15,206,10041,1207312,398640091,361721564040,875346670745937,

%T 5767525160678662991,102661002619385216856135,

%U 4940138347214734739677499008,643409155783450143737358154350996

%N Number of n X n 0..1 arrays with no 1 equal to more than two of its king-move neighbors.

%C Diagonal of A282528.

%e Some solutions for n=4

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

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

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

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

%Y Cf. A282528.

%K nonn

%O 1,1

%A _R. H. Hardin_, Feb 17 2017