login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 59th year, we have over 358,000 sequences, and we’ve crossed 10,300 citations (which often say “discovered thanks to the OEIS”).

Other ways to Give
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A220941 Number of nX4 arrays of occupancy after each element moves to some horizontal, vertical or antidiagonal neighbor 1
4, 2056, 291080, 43253705, 6388528170, 944223520057, 139549646254609, 20624731224928936, 3048237966941788465, 450515041275014945368, 66583978433834919848004, 9840795003881912664407189 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A220943

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..14

EXAMPLE

Some solutions for n=3

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

..2..1..1..4....2..4..1..2....0..2..0..0....0..3..1..1....1..5..2..1

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

CROSSREFS

Sequence in context: A004815 A198907 A207863 * A012869 A172941 A180993

Adjacent sequences: A220938 A220939 A220940 * A220942 A220943 A220944

KEYWORD

nonn

AUTHOR

R. H. Hardin Dec 25 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 November 29 16:39 EST 2022. Contains 358431 sequences. (Running on oeis4.)