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A288559
Number of arrangements of n pseudo-circles in the affine plane.
4
1, 1, 3, 14, 173, 16977
OFFSET
0,3
COMMENTS
These counts have been reduced for mirror symmetry.
See A250001, the main entry for this problem, for further information.
CROSSREFS
KEYWORD
nonn,more
AUTHOR
N. J. A. Sloane, Jun 13 2017, based on information supplied by Jon Wild on Aug 31 2016.
STATUS
approved