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

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A205982 Number of (n+1)X5 0..2 arrays with every 2X3 or 3X2 subblock having exactly two clockwise edge increases 1
11568, 33504, 103998, 419088, 1814784, 7793856, 35107968, 152423040, 654688608, 2949069312, 12803535360, 54993843072, 247721822208, 1075496970240, 4619482818048, 20808633065472, 90341745500160, 388036556716032 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A205986

LINKS

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

FORMULA

Empirical: a(n) = 84*a(n-3) for n>9

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Sequence in context: A063064 A205268 A063434 * A066055 A184685 A203387

Adjacent sequences:  A205979 A205980 A205981 * A205983 A205984 A205985

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 02 2012

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified May 26 13:59 EDT 2022. Contains 354092 sequences. (Running on oeis4.)