login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The OnLine Encyclopedia of Integer Sequences
!)
A227405
Order of the symmetry group of the densest possible packing of N circles in a larger circle. (If there are different patterns with the same density pick the largest value of the symmetry group order.)
2
4, 6, 8, 10, 12, 12, 14, 16, 2, 2, 6, 2
(
list
;
graph
;
refs
;
listen
;
history
;
text
;
internal format
)
OFFSET
2,1
COMMENTS
a(14) is unknown but conjectured to be 2.
The conjectured sequence is 4, 6, 8, 10, 12, 12, 14, 16, 2, 2, 6, 2, 2, 10, 2, 2, 12, 12, 2...
LINKS
Table of n, a(n) for n=2..13.
Wikipedia,
Circle packing in a circle
CROSSREFS
Sequence in context:
A139203
A179372
A240024
*
A061408
A063287
A228358
Adjacent sequences:
A227402
A227403
A227404
*
A227406
A227407
A227408
KEYWORD
sign
,
hard
,
more
AUTHOR
Keenan Pepper
, Sep 21 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 May 28 07:31 EDT 2023. Contains 362992 sequences. (Running on oeis4.)