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A288564 Number of connected one-sided arrangements of n pseudo-circles in the affine plane, in the sense that the union of the solid pseudo-circles is a connected set. 0
1, 1, 2, 11, 183, 30408 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

COMMENTS

Arrangements in A288563 that are connected (in the sense that the union of the solid pseudo-circles is a connected set).

These counts have not been reduced for mirror symmetry.

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

LINKS

Table of n, a(n) for n=0..5.

CROSSREFS

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

Sequence in context: A288556 A353930 A295246 * A295646 A124836 A013104

Adjacent sequences:  A288561 A288562 A288563 * A288565 A288566 A288567

KEYWORD

nonn,more

AUTHOR

N. J. A. Sloane, Jun 13 2017, based on information supplied by Jon Wild on Aug 31 2016.

STATUS

approved

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Last modified July 4 12:35 EDT 2022. Contains 355075 sequences. (Running on oeis4.)