https://dasturchi.uz/ofis-dasturlari/excel/1-9-fibonachchi-ketma-ketligi-fibonacci-sequence-%d0%bf%d0%be%d1%81%d0%bb%d0%b5%d0%b4%d0%be%d0%b2%d0%b0%d1%82%d0%b5%d0%bb%d1%8c%d0%bd%d0%be%d1%81%d1%82%d1%8c-%d1%84%d0%b8%d0%b1%d0%be%d0%bd%d0%b0/