0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144…
This sequence of numbers appears in biological settings:
- branching in trees
- flower petals
- apple seeds
- spiral rows in sunflowers
Plants do this because it is the most efficient way of packing things together in a small space.
Using the number divided by the number in front of it, the result will slowly yield to 1.618, the golden ratio, which also leads to the golden spiral.
Benc Tan 