<https://www.numerade.com/questions/list-the-first-five-terms-of-the-sequence-a_1-6-a_n1-frac-a_nn/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.numerade.com/questions/list-the-first-five-terms-of-the-sequence-a_1-6-a_n1-frac-a_nn/>