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A085633 Number of not necessarily connected coin graphs, also known as "penny" graphs. 1
1, 2, 4, 10, 25, 80, 267, 1078 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

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

LINKS

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

CROSSREFS

Cf. A085632.

Sequence in context: A006901 A123422 A123413 * A111564 A007021 A100605

Adjacent sequences:  A085630 A085631 A085632 * A085634 A085635 A085636

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 September 22 09:19 EDT 2017. Contains 292336 sequences.