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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
OFFSET
1,2
COMMENTS
Consider the arrangements of n circles described in A250001.
CROSSREFS
Row sums of triangle A274818.
For another version see A274823.
Sequence in context: A220067 A109779 A239984 * A179880 A297310 A371780
KEYWORD
nonn,hard,bref,more
AUTHOR
Omar E. Pol, Jul 07 2016
STATUS
approved