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A288563 Number of one-sided arrangements of n pseudo-circles in the affine plane. 1
1, 1, 3, 14, 200, 30630 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

COMMENTS

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: A058388 A327230 A288555 * A081383 A001320 A133028

Adjacent sequences:  A288560 A288561 A288562 * A288564 A288565 A288566

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 January 26 05:10 EST 2020. Contains 331273 sequences. (Running on oeis4.)