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

%I #4 Feb 14 2013 20:27:16

%S 4,8,83,1125,6582,89852,564838,7879795,50958999,723447048,4750196831,

%T 67994171066,451003258750,6495868727212,43379306929941,

%U 627562261878355,4211483429644946,61133435798313074,411800332378830207

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

%C Column 5 of A222290

%H R. H. Hardin, <a href="/A222287/b222287.txt">Table of n, a(n) for n = 1..79</a>

%e Some solutions for n=4

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Feb 14 2013