Explore the Fibonacci sequence
The Fibonacci sequence begins humbly with the numbers 0 and 1, then each subsequent number is the sum of the two preceding ones. So begins our exploration of the first 30 numbers in this spellbinding sequence:
0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 377, 610, 987, 1597, 2584, 4181, 6765, 10946, 17711, 28657, 46368, 75025, 121393, 196418, 317811, 514229, ...
And that's just the beginning! If you do it right, you could go on calculating these numbers to infinity. But don't panic, we've already prepared the first 100,000 for you to explore at your own pace!
ExploreSearch for a number
Want to know if a number is in the Fibonacci sequence? Don't worry, with our search tool you can check whether your number is part of the sequence or hidden in one of its numbers. It's fast, easy and fun!
Analyze the sequence
Wondering how the Fibonacci sequence evolves? Then come and discover the properties of this sequence through our various graphs: the growth of the numbers, the sum of their digits, the precision of the golden ratio, etc...
Download the sequence
Need to export the Fibonacci sequence? Download one of our CSV files containing the first 100, 1000, 10,000 or even 100,000 numbers - we've got it all ready for you. It's quick and easy, so enjoy your download!
Our users testify
At least, we wish they had... 😉
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“After discovering radioactivity, I thought nothing would ever amaze me again... until I discovered this site about the Fibonacci sequence! It's fascinating to see how these numbers are found in nature, just like radioactive elements. Bravo for this brilliant work, you've found the perfect formula to make mathematics exciting!”
Marie C. ⭐⭐⭐⭐⭐ -
“As a math and physics enthusiast, I have to say that this site is more fascinating than general relativity! Finally, a place where the Fibonacci sequence gets the love and attention it deserves. I wonder if I can apply these concepts to make my theories even more elegant. Bravo for this brilliant work, it's a true work of mathematical art!”
Albert E. ⭐⭐⭐⭐⭐ -
“At last, a site that appreciates the beauty of my small numbers! I'm delighted to see that, centuries later, my modest suite still holds such fascination. If I'd had the Internet back then, I'd certainly have spent my days commenting here! Keep it up, and maybe my suite will become as famous as the Pythagorean theorem. Bravo and long live the Fibonacci-nists!”
Leonardo F. ⭐⭐⭐⭐⭐ -
“I was resting under an apple tree when I came across this site. As captivating as the law of universal gravitation! The Fibonacci sequence has always intrigued me, and you've managed to make it even more fascinating. If only I'd had this tool in my day, I might have discovered a new mathematical law. Bravo for this exceptional site, it's a real digital gravity!”
Isaac N. ⭐⭐⭐⭐⭐