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A204942 Number of (n+2)X4 0..2 arrays with every 3X3 subblock having three equal elements in a row horizontally, vertically or nw-to-se diagonally exactly one way, and new values 0..2 introduced in row major order 1

%I #5 Mar 31 2012 12:37:03

%S 16032,328910,6907192,135480703,2795434368,58695095028,1207470043135,

%T 25041308069922,522156611063241,10836026931458739,225099736606852873,

%U 4683065466351804274,97330031208382877298,2022937940387433629191

%N Number of (n+2)X4 0..2 arrays with every 3X3 subblock having three equal elements in a row horizontally, vertically or nw-to-se diagonally exactly one way, and new values 0..2 introduced in row major order

%C Column 2 of A204945

%H R. H. Hardin, <a href="/A204942/b204942.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=3

%e ..0..0..0..1....0..0..0..0....0..0..1..0....0..0..1..1....0..1..0..2

%e ..0..2..2..2....0..0..1..2....1..1..2..2....1..1..0..0....1..2..2..1

%e ..1..1..2..1....1..2..1..2....2..2..2..2....1..1..1..0....1..1..1..1

%e ..0..0..0..1....1..0..1..1....1..2..1..1....2..0..2..0....0..2..0..0

%e ..0..0..1..1....1..2..2..2....1..0..1..1....0..1..0..0....2..0..0..1

%K nonn

%O 1,1

%A _R. H. Hardin_ Jan 20 2012

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