A297078 - OEIS

%I #6 Apr 26 2020 21:11:24

%S 2,12,136,6784,1180260,833228038,2245841563645,22323064130902079,

%T 816825481568045498590,109415592103170263245191759

%N Number of n X n 0..1 arrays with no 1 adjacent to 2 king-move neighboring 1's.

%C Diagonal of A297085.

%e Some solutions for n=5

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

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

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

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

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

%Y Cf. A297085.

%K nonn

%O 1,1

%A _R. H. Hardin_, Dec 25 2017