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a n = a 1 + d (n - 1) S = [n (a 1 +a n) ]/2 x̅ = (a 1 +a n) /2 σ = |d|*√ ( (n-1)* (n+1)/12) Example of an arithmetic progression calculation Assuming that a 1 = 5, d = 8 and that we want to find which

Step 1: Enter the terms of the sequence below. The Sequence Calculator finds the equation of the sequence and also allows you to view the next terms in the sequence. Arithmetic Sequence