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A274822
Total number of regions in all arrangements of n circles in the affine plane, including the regions that do not belong to the circles.
3
1, 7, 66
(list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Consider the arrangements of n circles described in A250001.
LINKS
Table of n, a(n) for n=1..3.
CROSSREFS
Row sums of triangle A274818.
For another version see A274823.
Cf. A250001, A274776.
Sequence in context: A220067 A109779 A239984 * A179880 A297310 A371780
Adjacent sequences: A274819 A274820 A274821 * A274823 A274824 A274825
KEYWORD
nonn,hard,bref,more
AUTHOR
Omar E. Pol, Jul 07 2016
STATUS
approved

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Last modified October 1 00:06 EDT 2024. Contains 376365 sequences.
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