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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A221615 Number of 7Xn arrays of occupancy after each element moves to some horizontal or antidiagonal neighbor, without move-in move-out left turns 0
0, 64, 42810, 41480899, 33145684280, 27294219603383, 22596355738886108, 18795109923272155626 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Row 7 of A221609

LINKS

Table of n, a(n) for n=1..8.

EXAMPLE

Some solutions for n=3

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

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

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

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

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

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

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

CROSSREFS

Sequence in context: A223353 A098843 A159400 * A141092 A283924 A016830

Adjacent sequences:  A221612 A221613 A221614 * A221616 A221617 A221618

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 20 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 | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified October 18 14:52 EDT 2019. Contains 328161 sequences. (Running on oeis4.)