In this progression, each number after 1 is equal to the sum of the previous two numbers ​ — 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, and so on. The flowers of many plants that exhibit a spiral growth pattern often have a Fibonacci number of petals.
यात, १ नंतरची प्रत्येक संख्या पहिल्या दोन संख्येच्या बेरीजेइतकीच असते — १, १, २, ३, ५, ८, १३, २१, ३४, ५५ वगैरे.