A202738 - OEIS

%I #5 Mar 31 2012 12:36:51

%S 2,22,140,838,5092,29680,183220,1061814,6630116,39048472,242647660,

%T 1438692856,8910239756,53090781836,327214611580,1954347351734,

%U 11998820896676,71771002591048,439163289580348,2629051988484048

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

%C Column 4 of A202742

%H R. H. Hardin, <a href="/A202738/b202738.txt">Table of n, a(n) for n = 1..74</a>

%e Some solutions for n=5

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Dec 23 2011