Consider intersecting ellipses.
The maximal number of regions into which these divide the plane
are

giving values for , 2, ... of 2, 6, 14, 26, 42, 62, 86, 114, ... (OEIS A051890).

## See also

Arrangement,

Circle Division by Lines,

Ellipse,

Plane
Division by Circles,

Plane Division by Lines
## Explore with Wolfram|Alpha

## References

Sloane, N. J. A. Sequence A051890 in "The On-Line Encyclopedia of Integer Sequences."Problem
Q607. *Parabola* **20**, 27, 1984.## Referenced on Wolfram|Alpha

Plane Division by Ellipses
## Cite this as:

Weisstein, Eric W. "Plane Division by Ellipses."
From *MathWorld*--A Wolfram Web Resource. https://mathworld.wolfram.com/PlaneDivisionbyEllipses.html

## Subject classifications