Number Sequence Calculator

Find the nth term and sum of arithmetic or geometric sequences.

Sequence Parameters

Sequence Type

First Term (a₁)

The first number in the sequence

Common Difference (d)

The constant added to each term

Number of Terms (n)

Find the nth term and sum

Sequence Formulas

aₙ = a₁ + (n-1)d

Sₙ = n/2 × (2a₁ + (n-1)d)

aₙ = a₁ × r^(n-1)

Sₙ = a₁ × (1 - r^n) / (1 - r)

Related Calculators

Solve quadratic equations (ax² + bx + c = 0) and find real or complex roots using the quadratic formula.

Calculate the slope, distance, and equation of a line between two points.

Perform matrix operations: addition, subtraction, multiplication, determinant, and inverse.

Sequence Results

Arithmetic Sequence

10th Term29

Sum of 10 Terms155

Formulaaₙ = 2 + 3(n - 1)

Common Difference3

First Terms

25811141720232629