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A204397 Number of (n+2)X9 0..1 arrays with no 3X3 subblock having three equal diagonal elements or three equal antidiagonal elements, and new values 0..1 introduced in row major order 1

%I #5 Mar 31 2012 12:37:01

%S 1276088,47258642,1547710600,46611372488,1536831498888,49709204045442,

%T 1597165262402016,51721201311318450,1671276692913450360,

%U 53960732756570371778,1744025607538600418280,56353915920328789667528

%N Number of (n+2)X9 0..1 arrays with no 3X3 subblock having three equal diagonal elements or three equal antidiagonal elements, and new values 0..1 introduced in row major order

%C Column 7 of A204398

%H R. H. Hardin, <a href="/A204397/b204397.txt">Table of n, a(n) for n = 1..127</a>

%e Some solutions for n=3

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Jan 15 2012

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Last modified September 11 02:26 EDT 2024. Contains 375813 sequences. (Running on oeis4.)