1673317776domain: NAppears in sequencesThe values of 'a' in a^2 + b^2 = c^2, where b - a = 17 and gcd(a, b, c) = 1.at n=21A117473Nonnegative values x of solutions (x, y) to the Diophantine equation x^2+(x+17)^2 = y^2.at n=32A118120a(n) = 7*a(n-1) - 7*a(n-2) + a(n-3) for n > 2; a(0) = 28, a(1) = 207, a(2) = 1248.at n=10A155466