A202737 - OEIS

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

%S 2,6,38,86,282,1074,2802,8694,30170,82286,251682,837026,2336882,

%T 7101030,23060898,65306934,197740602,632536014,1808535522,5464051326,

%U 17297449410,49797577110,150233445162,471996750978,1365869873682,4116478752054

%N Number of nX3 0..1 arrays with row sums equal and column sums unequal to adjacent columns

%C Column 3 of A202742

%H R. H. Hardin, <a href="/A202737/b202737.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=5

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Dec 23 2011