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A296408 Number of cylindrical connected arrangements of n pseudo-circles on a sphere, in the sense that the union of the pseudo-circles is a connected set and two cells of the arrangement are separated by each of the pseudo-circles, reduced for mirror symmetry. 0
1, 1, 1, 3, 20, 900, 530530 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

COMMENTS

For more information, see A288568.

LINKS

Table of n, a(n) for n=0..6.

CROSSREFS

Cf. A250001, A275923, A275924, A288554-A288568, A296406, A296407-A296412, A006248.

Sequence in context: A089943 A108699 A162134 * A002857 A345328 A203314

Adjacent sequences:  A296405 A296406 A296407 * A296409 A296410 A296411

KEYWORD

nonn,more

AUTHOR

Manfred Scheucher, Dec 11 2017

STATUS

approved

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Last modified October 26 08:00 EDT 2021. Contains 348267 sequences. (Running on oeis4.)