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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.

1, 1, 2, 11, 183, 30408

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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 * A368561 A295646 A124836

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

URL: https://oeis.org/A288564

⇱ A288564 - OEIS