login
Number of nX4 0..3 arrays with row sums equal and column sums unequal to adjacent columns
1

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

%S 108,4904,191208,7788648,315135868,13106373164,539443637988,

%T 22639602879704,946776650128788,40106804207313724,1690657696699919704,

%U 71964960511855011228,3057756409953021991140,130835056946777504268476

%N Number of nX4 0..3 arrays with row sums equal and column sums unequal to adjacent columns

%C Column 4 of A203031

%H R. H. Hardin, <a href="/A203028/b203028.txt">Table of n, a(n) for n = 1..20</a>

%e Some.solutions.for.n=5

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Dec 27 2011