A288554 Number of arrangements of n circles in the affine plane with the property that every circle intersects all the other circles.

1, 1, 1, 4, 45, 5102

Offset: 0

Author

N. J. A. Sloane, Jun 12 2017, based on information supplied by Jon Wild on Aug 31 2016

Keywords

• nonn
• more
• hard

Comments

See A250001, the main entry for this problem, for further information.

Links

• Jon Wild, Figure showing relationship between A250001, A275923, A275924, and A288554 for n=3 circles

Crossrefs

Cf. A250001, A275923, A275924, A288554-A288568.