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A204299 Number of nX6 0..3 arrays with every element neighboring horizontally or vertically both a 0 and a 1, and 2 introduced before 3 in row major order 1

%I

%S 0,212,19540,1972288,277234340,47309058644,5589659640640,

%T 870640738340900,123996249589648356,17750283049298827840,

%U 2576653369311868344772,370733913903692365171892,53509487787359717704828880

%N Number of nX6 0..3 arrays with every element neighboring horizontally or vertically both a 0 and a 1, and 2 introduced before 3 in row major order

%C Column 6 of A204301

%H R. H. Hardin, <a href="/A204299/b204299.txt">Table of n, a(n) for n = 1..30</a>

%e Some solutions for n=3

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

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

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

%K nonn

%O 1,2

%A _R. H. Hardin_ Jan 14 2012

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Last modified February 6 11:02 EST 2023. Contains 360104 sequences. (Running on oeis4.)