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

61, 3721, 196916, 10347649, 544875737, 28698007940, 1511450744648, 79603803814415, 4192507425158897, 220807551277341423, 11629311263707252062, 612483037985935327094, 32257754889454936954747, 1698925008894729788416226

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