A206183 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

Other ways to Give

A206183

Number of (n+1) X 4 0..3 arrays with every 2 X 2 subblock having the same number of clockwise edge increases as its horizontal neighbors and the same number of counterclockwise edge increases as its vertical neighbors.

15616, 205804, 3802676, 95187756, 2674444796, 78597249508, 2345626036136, 70435464744476, 2120394113295768, 63902858041046532, 1926797824397810952, 58109661058209293020, 1752687447844172570092, 52866528655142833934812

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

OFFSET

1,1

COMMENTS

Column 3 of A206188.

LINKS

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

EXAMPLE

Some solutions for n=4:

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

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

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

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

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

CROSSREFS

Sequence in context: A262793 A206104 A205654 * A205365 A254029 A129152

Adjacent sequences: A206180 A206181 A206182 * A206184 A206185 A206186

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 04 2012

STATUS

approved