I learned about it through this Numberphile video: https://www.youtube.com/watch?v=w-I6XTVZXww https://www.youtube.com/watch?v=w-I6XTVZXww There's also a nice

I learned about it through this Numberphile video: https://www.youtube.com/watch?v=w-I6XTVZXww https://www.youtube.com/watch?v=w-I6XTVZXww There's also a nice write-up from Terry Tao: https://terrytao.wordpress.com/2010/04/10/the-euler-maclaurin-formula-bernoulli-numbers-the-zeta-function-and-real-variable-analytic-continuation/ https://terrytao.wordpress.com/2010/04/10/the-euler-maclauri...