Fibonacci Sequence: From Rabbits to the Golden Ratio

The Fibonacci sequence: 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144... Each term equals the sum of the two before. As you go further, the ratio between consecutive terms approaches phi = (1+sqrt(5))/2 = 1.618... — the "golden ratio" that appears in flower petals, pinecones, hurricanes and Greek architecture. The sequence shows up in financial technical analysis (Fibonacci retracements), algorithm design (the Fibonacci heap data structure), and music theory. Our Fibonacci Generator computes any term instantly.