An arithmetic sequence is a list of numbers in which the difference between any two consecutive terms is always the same.This constant difference is called the common difference (d).Formula for the nth term:an = a1 + (n - 1)da1 = first termd = common differencen = position of the termExample:Sequence: 2, 5, 8, 11, 14, ...Here, d = 3 because each term increases by 3.