Sequence Calculator - Number Sequence Calculator

Free Online Sequence Calculator, Select Sequence Type and Enter values and click "Calculate" button and get result.

Select Sequence Type:

First Number (a):

Common Difference (f):

N^th Term (n):

Calculation results

Sequence Calculator - Number Sequence Calculator

Arithmetic Sequence Formula:

n^th term: \ ( a_n = a + (n - 1)d \) and Sum of n terms: \ ( S_n = \ frac{n}{2} (2a + (n - 1)d) \)

Geometric Sequence Formula:

n^th term: \( a_n = a \cdot r^{(n - 1)} \) and Sum of n terms: \ ( S_n = a \ frac{(1 - r^n)}{1 - r} \)

Fibonacci Sequence Formula:

n^th term: \( F(n) = F(n-1) + F(n-2) \) and Sum of n terms: \ ( \text{Sum} = \ sum_{i=1}^{n} F(i) \)