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A288554
Number of arrangements of n circles in the affine plane with the property that every circle intersects all the other circles.
24
1, 1, 1, 4, 45, 5102
OFFSET
0,4
COMMENTS
See A250001, the main entry for this problem, for further information.
CROSSREFS
KEYWORD
nonn,more,hard
AUTHOR
N. J. A. Sloane, Jun 12 2017, based on information supplied by Jon Wild on Aug 31 2016.
STATUS
approved