Problem 224
Almost right-angled triangles II
Let us call an integer sided triangle with sides a ≤ b ≤ c barely obtuse if the sides satisfy a2 + b2 = c2 - 1.
How many barely obtuse triangles are there with perimeter ≤ 75,000,000?
几乎执教的三角形II
如果一个边长为整数a ≤ b ≤ c的三角形满足a2 + b2 = c2 - 1，我们称其为略微钝角的三角形。
有多少个周长≤ 75,000,000的略微钝角三角形？