login
This site is supported by donations to The OEIS Foundation.

 

Logo

The OEIS is looking to hire part-time people to help edit core sequences, upload scanned documents, process citations, fix broken links, etc. - Neil Sloane, njasloane@gmail.com

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A145012 Half the number of n X n nonnegative integer arrays with every 2 X 2 subblock summing to 2. 0
5, 17, 37, 95, 185, 431, 805, 1799, 3305, 7247, 13237, 28775, 52505, 113711 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,1

LINKS

Table of n, a(n) for n=2..15.

CROSSREFS

Sequence in context: A048209 A181423 A146874 * A147204 A168024 A121326

Adjacent sequences:  A145009 A145010 A145011 * A145013 A145014 A145015

KEYWORD

nonn

AUTHOR

R. H. Hardin, Sep 29 2008

EXTENSIONS

Changed positive (programmer's definition) to nonnegative (mathematician's definition), added n X n. - R. H. Hardin, Sep 30 2008

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 | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy .

Last modified May 28 10:45 EDT 2017. Contains 287240 sequences.