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Number of nX6 binary arrays with every 1 immediately preceded by 0 0 to the left or above
1

%I #5 Mar 31 2012 12:36:55

%S 6,36,1125,20459,290787,4984843,86512536,1422678297,23676061927,

%T 398569091990,6665187099447,111312476711916,1863171147095028,

%U 31177909529015664,521431754829287284,8722671700852650274

%N Number of nX6 binary arrays with every 1 immediately preceded by 0 0 to the left or above

%C Column 6 of A203108

%H R. H. Hardin, <a href="/A203106/b203106.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=4

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Dec 29 2011