A281709 - OEIS

A281709

Number of n X n 0..1 arrays with no element unequal to a strict majority of its horizontal, diagonal and antidiagonal neighbors and with new values introduced in order 0 sequentially upwards.

%I #6 Apr 21 2020 13:03:34

%S 1,3,8,97,937,29849,1721319,178547832,41247350230,17968646792801

%N Number of n X n 0..1 arrays with no element unequal to a strict majority of its horizontal, diagonal and antidiagonal neighbors and with new values introduced in order 0 sequentially upwards.

%C Diagonal of A281715.

%e Some solutions for n=4

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

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

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

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

%Y Cf. A281715.

%K nonn

%O 1,2

%A _R. H. Hardin_, Jan 28 2017