A222453 - OEIS

%I #4 Feb 20 2013 17:03:28

%S 4,10,27,426,1847,16440,84558,910358,4757427,51324484,271866564,

%T 2984245628,15890235207,175650675430,939482925840,10439882627616,

%U 56035969028768,625001788261676,3364621225556746,37635020888605163

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

%C Column 5 of A222456

%H R. H. Hardin, <a href="/A222453/b222453.txt">Table of n, a(n) for n = 1..121</a>

%e Some solutions for n=4

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Feb 20 2013