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A205270 Number of (n+2)X7 0..1 arrays with every 3X3 subblock having three equal elements in a row horizontally, vertically or nw-to-se diagonally, and new values 0..1 introduced in row major order 1

%I #5 Mar 31 2012 12:37:05

%S 596414,51416847,4422079769,376019663515,32079295935853,

%T 2736913657929574,233446295978015247,19913133812861822666,

%U 1698610786398746095844,144892453140046154281434,12359421076416241941756207

%N Number of (n+2)X7 0..1 arrays with every 3X3 subblock having three equal elements in a row horizontally, vertically or nw-to-se diagonally, and new values 0..1 introduced in row major order

%C Column 5 of A205273

%H R. H. Hardin, <a href="/A205270/b205270.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=3

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Jan 24 2012

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Last modified April 25 10:51 EDT 2024. Contains 371967 sequences. (Running on oeis4.)