<P> In mathematics, a recurrence relation is an equation that recursively defines a sequence or multidimensional array of values, once one or more initial terms are given: each further term of the sequence or array is defined as a function of the preceding terms . </P> <P> The term difference equation sometimes (and for the purposes of this article) refers to a specific type of recurrence relation . However, "difference equation" is frequently used to refer to any recurrence relation . </P>

Is a sequence the same thing as a function
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