Sequence Calculator
nth term and partial sum for arithmetic or geometric sequences.
Result
a1039
Sum of first 10210
Sequence Calculator — FAQs
Arithmetic vs geometric?
Arithmetic adds a constant difference each step (3, 7, 11…); geometric multiplies by a ratio (3, 12, 48…).
nth term formulas?
Arithmetic: a₁ + (n−1)d. Geometric: a₁ × r^(n−1). Sum of arithmetic: n(a₁+aₙ)/2.
Need a Custom Tool Built?
We build calculators, estimators and internal tools for businesses in the UK and North America.
Get a QuoteEmbed this Sequence Calculator on your site
Free to use — paste this snippet into any webpage. It auto-resizes and includes a small attribution link. Add ?theme=dark to the iframe URL for dark mode.