970101

Appears in sequences

• a(n) = 99*a(n-1) - a(n-2); a(0) = 0, a(1) = 1.at n=4A171415
• Nonnegative values x of solutions (x, y) to the Diophantine equation x^2+(x+239)^2 = y^2.at n=15A204765