The On-Line Encyclopedia of Integer Sequences (OEIS)

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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.
(history; published version)

#7 by Jon E. Schoenfield at Fri Dec 11 21:29:21 EST 2015

STATUS

editing

approved

#6 by Jon E. Schoenfield at Fri Dec 11 21:29:19 EST 2015

NAME

Number of (n+1)X4 X 4 0..3 arrays with every 2X2 2 X 2 subblock having the same number of clockwise edge increases as its horizontal neighbors and the same number of anticlockwise counterclockwise edge increases as its vertical neighbors.

COMMENTS

Column 3 of A206188.

EXAMPLE

Some solutions for n=4:

AUTHOR

R. H. Hardin , Feb 04 2012

STATUS

approved

editing

#5 by Russ Cox at Sat Mar 31 12:37:10 EDT 2012

AUTHOR

_R. H. Hardin (rhhardin(AT)att.net) _ Feb 04 2012

Discussion

Sat Mar 31

12:37

OEIS Server: https://oeis.org/edit/global/875

#4 by Ron Hardin at Sat Feb 04 17:32:37 EST 2012

STATUS

editing

approved

#3 by Ron Hardin at Sat Feb 04 17:32:33 EST 2012

LINKS

R. H. Hardin, <a href="/A206183/b206183.txt">Table of n, a(n) for n = 1..210</a>

#2 by Ron Hardin at Sat Feb 04 17:32:13 EST 2012

NAME

allocated for Ron HardinNumber of (n+1)X4 0..3 arrays with every 2X2 subblock having the same number of clockwise edge increases as its horizontal neighbors and the same number of anticlockwise edge increases as its vertical neighbors

DATA

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

OFFSET

1,1

COMMENTS

Column 3 of A206188

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

KEYWORD

allocated

nonn

AUTHOR

R. H. Hardin (rhhardin(AT)att.net) Feb 04 2012

STATUS

approved

editing

#1 by Ron Hardin at Sat Feb 04 17:27:58 EST 2012

NAME

allocated for Ron Hardin

KEYWORD

allocated

STATUS

approved