All Tools VerseGenerate a Fibonacci-like Series
Generate a Fibonacci-like series from any two starting numbers, with exact big-number arithmetic.
- Runs in your browser
- Nothing uploaded
- Free, no sign-up
Processed locally in your browser. Your text never leaves this tab.
How to Use Generate a Fibonacci-like Series
- Set the first two terms. Any two whole numbers; the classic Fibonacci series starts with 0 and 1.
- Choose how many terms and a separator. Decide the length and layout.
- Generate. Each new term is the sum of the two before it.
- Copy the result. Click Copy result. It all runs in your browser.
Frequently Asked Questions
What is a Fibonacci-like series?
A series where each term is the sum of the two before it. Starting with 0 and 1 gives the classic Fibonacci numbers, but you can start with any two numbers.
Are large terms exact?
Yes. The tool uses exact big-number arithmetic, so even very large terms are correct to the last digit.
Can I use negative starting numbers?
Yes. Any two whole numbers work as the first two terms, including negatives.
How many terms can I generate?
Up to 100,000, separated by new line, space, or comma.
Is anything uploaded?
No. The series is generated in your browser, so nothing leaves the tab.
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