Number sequence guide

How to use the Number Sequence Calculator

The Number Sequence Calculator generates common sequences, shows the rule, and gives the next term so patterns are easier to check.

Open the number sequence calculator

Quick start

  1. Choose Arithmetic, Geometric, or Fibonacci.
  2. Enter the first values requested by that mode.
  3. Choose how many terms to generate.
  4. Press Generate sequence and review the rule and next term.

Choosing a sequence type

Arithmetic sequences add the same difference each time. Geometric sequences multiply by the same ratio each time.

Fibonacci-style sequences add the previous two terms to make the next term.

Checking a pattern

Use the first two values to define the pattern, then compare the generated terms with the sequence in your notes or assignment.

Copy the result when you need to paste the sequence into another document.

Examples from the calculator

Arithmetic First 3, difference 4

3, 7, 11, 15, 19

Geometric First 2, ratio 3

2, 6, 18, 54, 162

Fibonacci Start 1, 1

1, 1, 2, 3, 5, 8, 13

History, privacy, and copying

Recent answers stay visible in the page while you work. The history is kept only in the current browser tab and is not sent to a server.

Copy answer copies the expression and result so you can paste it into notes, homework, a message, or another document.