login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A207197 Number of nX4 0..2 arrays avoiding the pattern z-1 z-1 z in any row or column 1
69, 4761, 247002, 12539372, 632716336, 31901664357, 1610194874799, 81287871720373, 4104318500772121, 207237297025296600, 10464020397550910416, 528359580441380112910, 26678441328805428234587, 1347073335296997275306445 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A207201

LINKS

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

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Sequence in context: A206730 A207354 A207985 * A207217 A296785 A264171

Adjacent sequences:  A207194 A207195 A207196 * A207198 A207199 A207200

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 15 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 | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified May 9 10:12 EDT 2021. Contains 343729 sequences. (Running on oeis4.)