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!)
A205195 Number of (n+1)X3 0..3 arrays with rows and columns of permanents of all 2X2 subblocks lexicographically nondecreasing, and all 2X2 permanents nonzero 1
1720, 47900, 1256641, 25243114, 469617426, 7313092616, 106645806148, 1386271311184, 17063356609500, 194264369735315, 2113694462920360, 21750782413280669, 215532030982525812, 2048376973087641777 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A205198

LINKS

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

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Sequence in context: A276458 A252857 A234906 * A200958 A048958 A145648

Adjacent sequences:  A205192 A205193 A205194 * A205196 A205197 A205198

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 23 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 January 26 06:23 EST 2022. Contains 350572 sequences. (Running on oeis4.)