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A209087 Number of n X 3 0..3 arrays avoiding the pattern z z+1 z horizontally and z z-1 z vertically. 1

%I

%S 61,3721,196916,10347649,544875737,28698007940,1511450744648,

%T 79603803814415,4192507425158897,220807551277341423,

%U 11629311263707252062,612483037985935327094,32257754889454936954747,1698925008894729788416226

%N Number of n X 3 0..3 arrays avoiding the pattern z z+1 z horizontally and z z-1 z vertically.

%C Column 3 of A209092.

%H R. H. Hardin, <a href="/A209087/b209087.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=4

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

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

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

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

%Y Cf. A209092.

%K nonn

%O 1,1

%A _R. H. Hardin_ Mar 05 2012

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Last modified October 7 14:13 EDT 2022. Contains 357271 sequences. (Running on oeis4.)