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Number of n X 7 binary arrays with every 1 immediately preceded by 0 0 to the left or above.
1

%I #9 Nov 16 2014 03:34:24

%S 9,81,4314,130886,3058275,86512536,2482513429,67503863246,

%T 1856382696349,51633511183958,1427030810399597,39387690638977285,

%U 1089488148528198780,30128638070023208442,832728521178275562686,23020941223065491588705

%N Number of n X 7 binary arrays with every 1 immediately preceded by 0 0 to the left or above.

%C Column 7 of A203108.

%H R. H. Hardin, <a href="/A203107/b203107.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=3

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_, Dec 29 2011