|
%I #7 Mar 31 2012 12:36:54
%S 4,28,396,4904,57100,690204,8590508,107540900,1351412312,17089354228,
%T 217260030296,2772566648936,35493572774080,455659755476112,
%U 5864044526023588,75626604339946212,977151287857792884
%N Number of 2Xn 0..3 arrays with row sums equal and column sums unequal to adjacent columns
%C Row 2 of A203031
%H R. H. Hardin, <a href="/A203032/b203032.txt">Table of n, a(n) for n = 1..28</a>
%e Some.solutions.for.n=5
%e ..3..1..0..2..0....1..1..0..3..2....2..3..0..0..3....2..3..1..3..3
%e ..0..3..3..0..0....3..1..0..3..0....0..3..2..1..2....1..3..3..2..3
%K nonn
%O 1,1
%A _R. H. Hardin_ Dec 27 2011
| 