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.

1, 1, 2, 11, 183

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