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!)
A222718 Number of nX2 0..3 arrays with exactly floor(nX2/2) elements equal to at least one horizontal, vertical or antidiagonal neighbor, with new values introduced in row major 0..3 order 1
0, 6, 30, 666, 6524, 103378, 1250904, 17976376, 235892592, 3296371800, 44713314784, 621198984864, 8554092568512, 118954438125472, 1651089670102400, 23021868920182656, 321109217833684736, 4490028930013194112 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Column 2 of A222722
LINKS
EXAMPLE
Some solutions for n=3
..0..1....0..1....0..0....0..1....0..1....0..1....0..1....0..0....0..1....0..1
..2..1....2..3....1..0....1..1....0..2....0..0....1..1....0..1....1..1....2..2
..1..3....2..2....2..1....2..3....0..3....1..2....2..0....2..0....0..2....1..2
CROSSREFS
Sequence in context: A075591 A130075 A066388 * A200894 A202861 A088256
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 03 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 March 29 06:15 EDT 2024. Contains 371265 sequences. (Running on oeis4.)