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

%I #5 Mar 31 2012 12:37:02

%S 145760,15713085,1803801730,161070061826,16182427177333,

%T 1639434747658238,159950005645169941,15886971277197776321,

%U 1579652667608040172323,156196326978244203268552,15486063123621706338330719

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

%C Column 2 of A204530

%H R. H. Hardin, <a href="/A204527/b204527.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=3

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

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

%e ..1..0..1..0....3..1..1..0....1..0..0..0....0..0..0..1....2..2..1..2

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

%e ..2..1..1..0....0..3..1..1....2..3..0..1....0..3..2..3....0..3..3..0

%K nonn

%O 1,1

%A _R. H. Hardin_ Jan 15 2012