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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
61, 3721, 196916, 10347649, 544875737, 28698007940, 1511450744648, 79603803814415, 4192507425158897, 220807551277341423, 11629311263707252062, 612483037985935327094, 32257754889454936954747, 1698925008894729788416226 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A209092.

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

EXAMPLE

Some solutions for n=4

..2..0..3....0..3..3....1..0..2....1..0..0....1..1..0....3..2..2....1..3..3

..0..2..0....0..1..3....3..2..1....0..0..3....3..2..3....0..2..3....1..1..3

..3..1..1....2..1..1....1..0..3....2..2..1....3..0..0....3..0..1....0..1..1

..2..0..2....2..1..1....3..0..1....0..1..3....2..1..3....2..3..3....0..1..1

CROSSREFS

Cf. A209092.

Sequence in context: A206962 A206572 A207577 * A207052 A207129 A302329

Adjacent sequences:  A209084 A209085 A209086 * A209088 A209089 A209090

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 05 2012

STATUS

approved

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Last modified August 11 15:10 EDT 2022. Contains 356066 sequences. (Running on oeis4.)