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!)
A210811 Number of (n+1)X(n+1) 0..2 symmetric matrices containing all values 0..2 with every 2X2 subblock having two or three distinct values, and new values 0..2 introduced in lower triangle row major order 1
1, 77, 6229, 1262225, 726073329, 1209785791625, 5850732086362939, 82137353908070795417, 3347356112526068595635969, 395998823277249889265284827949, 135993026862887326817175277464490671 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..16

EXAMPLE

Some solutions for n=3

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

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

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

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

CROSSREFS

Sequence in context: A116319 A217962 A180837 * A107787 A099638 A046191

Adjacent sequences:  A210808 A210809 A210810 * A210812 A210813 A210814

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 26 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 August 9 09:43 EDT 2022. Contains 356021 sequences. (Running on oeis4.)