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Number of nX3 0..2 arrays with adjacent row and column sums unequal
1

%I #5 Mar 31 2012 12:36:53

%S 12,352,8460,194636,4439916,100236532,2247406834,50175952564,

%T 1116665770790,24792319092616,549446441126732,12159393350480352,

%U 268781263257739898,5935782137606108232,130983931680297881360

%N Number of nX3 0..2 arrays with adjacent row and column sums unequal

%C Column 3 of A202931

%H R. H. Hardin, <a href="/A202926/b202926.txt">Table of n, a(n) for n = 1..55</a>

%e Some solutions for n=4

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

%e ..1..1..1....1..1..1....1..2..1....1..0..1....2..0..1....1..1..0....2..2..1

%e ..0..1..1....1..2..1....0..2..1....1..1..1....0..2..2....0..2..1....1..2..1

%e ..1..2..0....2..0..0....2..1..1....2..2..2....2..0..1....0..0..0....1..2..0

%K nonn

%O 1,1

%A _R. H. Hardin_ Dec 26 2011