A205663 - OEIS

A205663

Number of 6X(n+1) 0..3 arrays with every 2 X 2 subblock having the same number of clockwise edge increases as its horizontal neighbors and no 2 X 2 subblock having the same number of counterclockwise edge increases as its vertical neighbors.

1285076, 3323532, 21711080, 353779964, 7578064080, 183567605276, 4682468347176, 124579524794520, 3411090643151380, 95602219996726052, 2724704605809032788, 78683390684511013956, 2294465096368178137108

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

Row 5 of A205659.

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..120

EXAMPLE

Some solutions for n=4:

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

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

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

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

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

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

CROSSREFS

Sequence in context: A250619 A091291 A205178 * A205952 A205463 A247583

Adjacent sequences: A205660 A205661 A205662 * A205664 A205665 A205666

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 30 2012

STATUS

approved