3, 7, 11, 15, 19
Number Sequence Calculator
Use this free number sequence calculator to generate arithmetic sequences, geometric sequences, Fibonacci-style sequences, next terms, formulas, steps, copy, and history.
Formula steps Examples included Copy results Private history
a(n) = 3 + (n - 1) x 43, 7, 11, 15, 19, 23, 27, 31
- Type
- arithmetic
- Next terms
- 35, 39, 43
- Terms
- 8
Steps
- Start with first term 3.
- Add the common difference 4 each time.
- Generate 8 terms, then continue the same pattern for the next terms.
How to use the number sequence calculator
- Choose arithmetic, geometric, or Fibonacci sequence mode.
- Enter the starting values and how many terms you want.
- Press Generate sequence to see the list, rule, and next term.
- Use examples, recent answers, or copy the sequence while studying patterns.
Common uses
Create arithmetic sequences from a first term and common difference.
Create geometric sequences from a first term and common ratio.
Generate Fibonacci-style sequences from two starting terms.
Check next terms and sequence formulas for study examples.
Examples
2, 6, 18, 54, 162
1, 1, 2, 3, 5, 8, 13
Frequently asked questions
Quick answers about formulas, inputs, examples, result copying, and private in-browser history.
What sequence types are supported?
The calculator supports arithmetic, geometric, and Fibonacci-style sequences. More sequence types can be added later.
What is an arithmetic sequence?
An arithmetic sequence changes by the same amount each time. That constant amount is called the common difference.
What is a geometric sequence?
A geometric sequence changes by multiplying by the same value each time. That value is called the common ratio.
How does the Fibonacci-style mode work?
It starts with two values, then adds the previous two terms to make each next term.
Can I generate decimals or negative terms?
Yes. The first term, common difference, common ratio, and second Fibonacci-style term can be decimals or negative numbers.
Is my sequence history private?
Yes. Recent sequences stay only in the current browser tab while you use the page. They are not sent to a server.
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