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!)
A223146 Number of nX4 0..2 arrays with no more than floor(nX4/2) elements equal to at least one horizontal, vertical or antidiagonal neighbor, with new values introduced in row major 0..2 order 1
10, 187, 4065, 84196, 1753639, 36926759, 788312639, 17055726949, 373400072400, 8256792930855, 184090480905482, 4132305583955186, 93275576521838179, 2115119659086818460, 48145683687395482000, 1099433387636066838881 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 4 of A223149
LINKS
EXAMPLE
Some solutions for n=3
..0..1..2..1....0..1..0..1....0..1..2..1....0..1..2..0....0..1..0..1
..1..0..0..1....2..1..2..0....1..1..0..2....2..0..1..0....2..1..2..1
..2..1..2..0....2..0..2..1....1..2..1..0....1..0..2..1....1..0..1..2
CROSSREFS
Sequence in context: A179521 A211102 A121973 * A365175 A239765 A006409
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 16 2013
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 April 23 19:56 EDT 2024. Contains 371916 sequences. (Running on oeis4.)