The nth term of a sequence is (n + 1)2. What is the the numeric value of the 4th term?

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The letter n (usually in italics) is often used in algebra to indicate the position of a term in a sequence.  


The <i>n</i>th term of a sequence is (n + 1)<sup>2</sup>. What is the the numeric value of the 4<sup>th</sup> term?