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URL: https://oeis.org/A288556

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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: A385775 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