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!)
A288556 Number of connected one-sided arrangements of n circles in the affine plane, in the sense that the union of the solid circles is a connected set. 0
1, 1, 2, 11, 183 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

COMMENTS

These counts are not reduced for mirror symmetry.

See A250001, the main entry for this problem, for further information.

LINKS

Table of n, a(n) for n=0..4.

CROSSREFS

Cf. A250001, A275923, A275924, A288554-A288568.

Sequence in context: A217391 A297601 A089760 * A353930 A295246 A288564

Adjacent sequences:  A288553 A288554 A288555 * A288557 A288558 A288559

KEYWORD

nonn,more

AUTHOR

N. J. A. Sloane, Jun 13 2017, based on information supplied by Jon Wild.

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 June 29 05:44 EDT 2022. Contains 354910 sequences. (Running on oeis4.)