Sequence Calculator

Arithmetic and geometric sequences — terms, sum, nth term

First Term (a₁)

Common Difference (d)

Number of Terms (max 100)

About

Arithmetic: aₙ = a₁ + (n−1)d, Sum = n/2 × (a₁ + aₙ). Geometric: aₙ = a₁ × r^(n−1), Sum = a₁(rⁿ−1)/(r−1). Arithmetic sequences have constant differences; geometric sequences have constant ratios.