A203027 - OEIS

%I #7 Mar 31 2012 12:36:54

%S 36,396,4740,50716,578696,6829968,77256180,900837948,10744263240,

%T 124084485456,1463920739636,17570679180208,205416961911028,

%U 2441375153064180,29416331612748560,346614764617651324

%N Number of nX3 0..3 arrays with row sums equal and column sums unequal to adjacent columns

%C Column 3 of A203031

%H R. H. Hardin, <a href="/A203027/b203027.txt">Table of n, a(n) for n = 1..67</a>

%e Some.solutions.for.n=5

%e ..0..1..0....0..2..0....3..3..1....2..2..0....2..1..0....3..2..3....1..1..1

%e ..0..0..1....0..1..1....2..3..2....0..1..3....2..1..0....2..3..3....0..1..2

%e ..0..0..1....0..2..0....1..3..3....3..0..1....1..0..2....2..3..3....3..0..0

%e ..0..1..0....1..0..1....1..3..3....1..1..2....2..0..1....2..3..3....2..0..1

%e ..0..0..1....2..0..0....3..1..3....3..1..0....2..0..1....2..3..3....0..1..2

%K nonn

%O 1,1

%A _R. H. Hardin_ Dec 27 2011