A207692 - OEIS

%I #5 Mar 31 2012 12:37:18

%S 40,1600,1296,5856,18564,50096,145200,453420,1403184,4038800,12177100,

%T 36992544,110036104,332138592,989787144,2977771420,8964400760,

%U 26737629576,80548970652,241336844800,723444785800,2175007306820

%N Number of nX7 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 0 1 and 1 1 1 vertically

%C Column 7 of A207693

%H R. H. Hardin, <a href="/A207692/b207692.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=4

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Feb 19 2012