A297714 - OEIS

%I #6 May 03 2020 15:35:57

%S 1,10,145,4212,512354,183324631,154327332017,362685079640486,

%T 2553300741336194602

%N Number of n X n 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 1, 2 or 4 neighboring 1's.

%C Diagonal of A297720.

%e Some solutions for n=4

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

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

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

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

%Y Cf. A297720.

%K nonn

%O 1,2

%A _R. H. Hardin_, Jan 04 2018