A222766 - OEIS

%I #4 Mar 05 2013 03:02:05

%S 4,18,158,2608,19766,333978,2645385,45830457,370518626,6504289924,

%T 53224723750,942396671062,7774316625479,138492173604656,

%U 1149166452333809,20564313304270211,171388475477573948,3077759439903425070

%N Number of nX5 0..1 arrays with exactly floor(nX5/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..1 order

%C Column 5 of A222769

%H R. H. Hardin, <a href="/A222766/b222766.txt">Table of n, a(n) for n = 1..205</a>

%e Some solutions for n=3

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Mar 05 2013