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A206940 Number of 7Xn 0..1 arrays avoiding 0 0 0 horizontally and 0 1 1 vertically 1

%I #5 Mar 31 2012 12:37:14

%S 54,2916,28081,783557,20054092,348614952,8138711727,180107729045,

%T 3670799062946,80941950903896,1744792238104043,37022171557304461,

%U 801688023085812936,17220005386273509432,368962831518287162081

%N Number of 7Xn 0..1 arrays avoiding 0 0 0 horizontally and 0 1 1 vertically

%C Row 7 of A206936

%H R. H. Hardin, <a href="/A206940/b206940.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=4

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

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

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Feb 13 2012

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Last modified April 24 20:08 EDT 2024. Contains 371963 sequences. (Running on oeis4.)