The 𝒏th term refers to a term's position in the sequence, for example, the first term has 𝒏 = 1, the second term has 𝒏 = 2 and so on. An expression for the 𝒏th term is worked out by ...

For example, the 50th term can be calculated without calculating the first 49 terms, which would take a long time. To work out whether 14 is in this sequence, put the nth term equal to the number ...