Calculate Fibonacci-like Series

Calculate Fibonacci-like Series gives you an easy way to explore sequences that follow the same rule as Fibonacci each term is the sum of the two before it but starting from different values. In this case, the series begins with 3 and 1. That one small change leads to a completely different set of numbers.

You can generate up to 1000 terms and see them instantly. There’s no waiting, no formulas to write, and no clutter. Just type the number of terms you want, and the tool displays the sequence in real time. The output is clean, one value per line, and you can copy or export it as needed.

Paste your input above or import a file below.
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Supported file types: .txt, .csv, .tsv, .log, .json, .xml, .md, .ini, .yaml, .yml, .html, .htm, .css
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Options
Reverse order
Use custom seed
Output format:

How to Use:

  1. Enter a number between 1 and 1000 in the input box.
  2. Click “Generate” or just type to trigger live updates.
  3. The Fibonacci-like sequence appears immediately in the output box.
  4. Click “Copy Output” to copy it to your clipboard.
  5. Click “Export to File” to save it as a text file.
  6. Hit “Clear All” to reset and enter a new amount.

Example:

Input:

7

Output:

3  
1
4
5
9
14
23

Each number is created by adding the two numbers that came before it, just like the traditional Fibonacci sequence but the starting point changes everything.

Common Use Cases:

Calculate Fibonacci-like Series is perfect for exploring sequence behavior, testing algorithms, and generating data for coding exercises. It’s great for math students comparing different recursive structures or programmers creating seed values for simulations. Since it starts with different numbers, it helps show how small changes in inputs can lead to major differences in output. Whether you’re in a classroom, a code editor, or just digging into number patterns, it delivers results right when you need them.

Useful Tools & Suggestions:

Once you’ve got your custom sequence, Analyze a Number helps you break down individual entries to spot patterns. And if you’re comparing growth rates, Generate a Geometric Progression is a solid contrast to linear-style builds.