Sequences & Series Calculator

Calculate arithmetic and geometric sequences and series. Includes step-by-step solutions and visual representations.

Quick Examples:

📊 Sequence Results

📝 Sequence Formulas:

Arithmetic: aₙ = a₁ + (n-1)d, Sₙ = n/2 × [2a₁ + (n-1)d]
Geometric: aₙ = a₁ × r^(n-1), Sₙ = a₁(1 - rⁿ)/(1 - r) for r ≠ 1
Infinite Geometric Sum (|r| < 1): S∞ = a₁/(1 - r)