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!)
A205229 Number of (n+1)X3 0..2 arrays with rows and columns of permanents of all 2X2 subblocks lexicographically nondecreasing, and all 2X2 permanents nonzero 1
266, 2773, 27157, 221766, 1707082, 11675764, 76088840, 460518847, 2683735998, 14905311330, 80378339143, 419363315736, 2137855359517, 10641083611371, 51996072608754, 249514965798706, 1179572239075227, 5497644720565445 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A205235

LINKS

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

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Sequence in context: A260134 A242320 A225935 * A028523 A265034 A278625

Adjacent sequences:  A205226 A205227 A205228 * A205230 A205231 A205232

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 24 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 October 20 10:43 EDT 2021. Contains 348100 sequences. (Running on oeis4.)