A339266 Numbers of connected arrangements of n equal circles in the affine plane, in the sense that the union of the boundaries of the circles is a connected set.

1, 1, 1, 4, 29

Offset: 0

Author

Ya-Ping Lu, Nov 29 2020

Keywords

• nonn
• more

Examples

			Configurations for a(1) through a(4) are given in the links.
		

Links

• Ya-Ping Lu, Configurations for a(1) through a(4)
• Jon Wild, Illustrations of the 173 configurations of four circles

Crossrefs

Cf. A250001, A275923, A275924, A288554-A288568, A296407