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A085632 Number of connected coin graphs, also known as "penny" graphs. 2
1, 1, 2, 5, 13, 46, 162, 715 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

The intersection graph of unit disks which are not allowed to overlap.

LINKS

Table of n, a(n) for n=1..8.

Erich Friedman, Illustration for A085632

CROSSREFS

Cf. A085633.

Sequence in context: A000719 A149875 A221546 * A111563 A079573 A194635

Adjacent sequences:  A085629 A085630 A085631 * A085633 A085634 A085635

KEYWORD

more,nonn

AUTHOR

Leah Hackman (lhackman(AT)cs.ualberta.ca), Martha Lednicky (lednicky(AT)cs.ualberta.ca), Jim Nastos and Rick L. Shepherd, Jul 10 2003

STATUS

approved

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Last modified May 27 07:55 EDT 2017. Contains 287202 sequences.