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

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