Almost Right-angled Triangles II
Let us call an integer sided triangle with sides $a \le b \le c$ barely obtuse if the sides satisfy
$a^2 + b^2 = c^2 - 1$.
How many barely obtuse triangles are there with perimeter $\le 75\,000\,000$?
Let us call an integer sided triangle with sides $a \le b \le c$ barely obtuse if the sides satisfy
$a^2 + b^2 = c^2 - 1$.
How many barely obtuse triangles are there with perimeter $\le 75\,000\,000$?