Problem 195
Inscribed circles of triangles with one angle of 60 degrees

Let's call an integer sided triangle with exactly one angle of 60 degrees a 60-degree triangle.
Let r be the radius of the inscribed circle of such a 60-degree triangle.

There are 1234 60-degree triangles for which r ≤ 100.
Let T(n) be the number of 60-degree triangles for which r ≤n, so
T(100) = 1234,  T(1000) = 22767, and  T(10000) = 359912.

Find T(1053779).

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http://projecteuler.net/problem=195