A222773 - OEIS

%I #4 Mar 05 2013 03:08:04

%S 0,48,301,3431,19766,256546,1570588,21526008,136549058,1916013454,

%T 12429454430,176824724591,1163475046332,16694274193142,

%U 110869265032135,1600019787081011,10694449471174787,154977656102006006

%N Number of 5Xn 0..1 arrays with exactly floor(5Xn/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..1 order

%C Row 5 of A222769

%H R. H. Hardin, <a href="/A222773/b222773.txt">Table of n, a(n) for n = 1..39</a>

%e Some solutions for n=3

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

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

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

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

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

%K nonn

%O 1,2

%A _R. H. Hardin_ Mar 05 2013