Fibonacci Numbers

The Fibonacci Sequence starts with 1, 1, followed by the sum of the last two numbers in the sequence.

The Fibonacci Sequence is named after the Italian mathematician Leonardo Fibonacci.

The Fibonacci Sequence is found everywhere, such as: how the seeds in a sunflower are arranged, how the spiral of a shell is formed, how artichoke leaves flower, and how the waves curve.

To find out if a number is in the Fibonacci Sequence, please submit your number here:

Here are some examples. Find out if any of these numbers are Fibonacci Numbers!

Is 29 a Fibonacci Number?

Is 34 a Fibonacci Number?

Is 99 a Fibonacci Number?

Is 233 a Fibonacci Number?

Is 322 a Fibonacci Number?

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