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A203493 Number of 3Xn 0..2 arrays with row sums equal and column sums unequal to adjacent columns 1

%I

%S 3,36,624,9540,170868,3171708,59683122,1152091884,22554305502,

%T 446374660920,8921216076156,179685599410440,3642895093030506,

%U 74273800555695024,1521731710882139544,31310362607335978500

%N Number of 3Xn 0..2 arrays with row sums equal and column sums unequal to adjacent columns

%C Row 3 of A203491

%H R. H. Hardin, <a href="/A203493/b203493.txt">Table of n, a(n) for n = 1..50</a>

%e Some solutions for n=5

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Jan 02 2012

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Last modified April 6 08:44 EDT 2020. Contains 333268 sequences. (Running on oeis4.)