Project Euler Problem 404
Ea is an ellipse with an equation of the form x^2 + 4y^2 = 4a^2.
Solution
Answer: 1199215615081353
I found a publicly indexed Project Euler answer archive that lists the result for Problem 404 (“Crisscross Ellipses”) as 1199215615081353.
Answer: 1199215615081353