A288567
Number of connected arrangements of n circles in the affine plane, in the sense that the union of the boundaries of the circles is a connected set and every circle intersects all the other circles.
Original entry on oeis.org
1, 1, 1, 3, 21, 980
Offset: 0
A296408
Number of cylindrical connected arrangements of n pseudo-circles on a sphere, in the sense that the union of the pseudo-circles is a connected set and two cells of the arrangement are separated by each of the pseudo-circles, reduced for mirror symmetry.
Original entry on oeis.org
1, 1, 1, 3, 20, 900, 530530
Offset: 0
A296409
Number of digon-free cylindrical connected arrangements of n pseudo-circles on a sphere, in the sense that the union of the pseudo-circles is a connected set and two cells of the arrangement are separated by each of the pseudo-circles, reduced for mirror symmetry.
Original entry on oeis.org
1, 1, 1, 1, 3, 30, 4477
Offset: 0
A296410
Number of non-isomorphic digon-free arrangements of n pairwise intersecting pseudo-circles on a sphere, reduced for mirror symmetry.
Original entry on oeis.org
1, 1, 1, 1, 2, 14, 2131, 3012972
Offset: 0
A296411
Number of non-isomorphic cylindrical arrangements of n pairwise intersecting pseudo-circles on a sphere, in the sense that two cells of the arrangement are separated by each of the pseudo-circles, reduced for mirror symmetry.
Original entry on oeis.org
1, 1, 1, 8, 278, 144395, 436634633
Offset: 0
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