Number Sequence Generator
Generate arithmetic or geometric sequences with any first term, step, and length.
a(n) = 1 + (n−1) × 2
10 terms · Sum = 100
Arithmetic vs geometric sequences
An arithmetic sequence adds a fixed amount each term: 1, 3, 5, 7, … (difference = 2). A geometric sequence multiplies by a fixed ratio: 2, 6, 18, 54, … (ratio = 3). This generator produces up to 200 terms and shows the explicit nth-term formula. The sum is calculated for the full sequence when all values are finite.
For the Fibonacci sequence, see the Fibonacci Generator. For prime number testing, use the Prime Number Checker.
Private & free — this tool runs entirely in your browser.
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