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A202427 Number of (n+2)X(n+2) binary arrays avoiding patterns 000 and 001 in rows, columns and nw-to-se diagonals 1

%I #6 Mar 31 2012 12:36:47

%S 108,2100,67072,4502836,570876264,142785263584,69184636563900,

%T 65419917142298252,120362711752648774656,431392315946934883527224,

%U 3010546776670356917559015060,40915921508288561665462211859200

%N Number of (n+2)X(n+2) binary arrays avoiding patterns 000 and 001 in rows, columns and nw-to-se diagonals

%C Diagonal of A202435

%H R. H. Hardin, <a href="/A202427/b202427.txt">Table of n, a(n) for n = 1..19</a>

%e Some solutions for n=3

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Dec 19 2011

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