A205658 - OEIS

A205658

Number of (n+1)X8 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.

62623348, 732727336, 9029185188, 186979308144, 4682468347176, 106351019923768, 2904705131186012, 69836058310563888, 1989650257922684392, 48627125950280766136, 1406446756952780801628, 34607286834571007711144

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

OFFSET

1,1

COMMENTS

Column 7 of A205659.

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..16

EXAMPLE

Some solutions for n=4:

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

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

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

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

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

CROSSREFS

Sequence in context: A096559 A203943 A125063 * A206187 A205369 A157855

Adjacent sequences: A205655 A205656 A205657 * A205659 A205660 A205661

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 30 2012

STATUS

approved