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Number of nX3 0..1 arrays with no more than floor(nX3/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..1 order
1

%I #4 Mar 11 2013 13:41:18

%S 1,7,24,169,557,4108,14040,104533,365722,2734747,9710957,72847186,

%T 261226274,1964845906,7094565566,53482760485,194106792191,

%U 1466023062226,5342045681862,40409217721285,147724548119380,1118883744204523

%N Number of nX3 0..1 arrays with no more than floor(nX3/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..1 order

%C Column 3 of A223012

%H R. H. Hardin, <a href="/A223007/b223007.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=3

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

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

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

%K nonn

%O 1,2

%A _R. H. Hardin_ Mar 11 2013