Massachusetts Institute of Technology: Srini Devadas and Eric Lehman's "Sums and Approximations"

Note that you have already read this lecture in Subunit 4.2. Focus on re-reading Section 1.2 on page 3, which finds a formula not for the terms of the sequence, but for the sum of the terms of the sequence.

Click https://s3.amazonaws.com/saylordotorg-resources/wwwresources/site/wp-content/uploads/2011/09/CS202-Summations.pdf link to open resource.