A222628 - OEIS

A222628

Number of n X n 0..1 arrays with no more than floor(n X n/2) elements unequal to at least one horizontal, vertical or antidiagonal neighbor, with new values introduced in row major 0..1 order

%I #5 Dec 18 2015 18:18:27

%S 1,1,5,161,3200,314146,34323408,16813884210,8503001699073,

%T 19277280866911336

%N Number of n X n 0..1 arrays with no more than floor(n X n/2) elements unequal to at least one horizontal, vertical or antidiagonal neighbor, with new values introduced in row major 0..1 order

%C Diagonal of A222635

%e All solutions for n=3

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

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

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

%K nonn

%O 1,3

%A _R. H. Hardin_ Feb 26 2013