118326domain: NAppears in sequencesa(n) = (prime(n)^4 - 1) / 240.at n=17A089034Consider a Pythagorean triangle with sides a=u^2-v^2, b=2uv, c=u^2+v^2. The sequence is the area of the triangle when v=2, u=3,4,5,...at n=36A096382Upper Pythagorean twins.at n=36A228877