Then the clockwise and counter-clockwise spiral pattern of seeds arranged on the sunflowers, the arrangement of scales on fir cones and pineapples are all associated with the Fibonacci series.

• 向日葵花的种子排列,以及松树球果和菠萝的鳞片,顺时针方向与反时针方向的纹数,都与费波那契数列有关。