For the sequence, find a formula for the general term and specify the appropriate starting value of n.
If we look at the numerator first we see the sequence n! starting at n = 1. Then the denominator is 2n – 1. Starting at n = 1, the general term is
If instead we look at the denominator first we might see the sequence (2n + 1) starting at n = 0. Then the numerator is (n + 1)!. Starting at n = 0, the general term is