# University Seminar: Computability, Complexity, and Algebraic Structure-A Nasty Surprise in a Sequence, and Other Recent OEIS Stories

Jointly with DIMACS - RUTGERS Experimental Mathematics Seminar

Time: Thursday, October 10, 2024, 5:00pm - 6:00pm

Place: Presented via Zoom: https://rutgers.zoom.us/j/

Password: 6564120420

Speaker: Neil Sloane, OEIS Foundation and Rutgers University

Title: A Nasty Surprise in a Sequence, and Other Recent OEIS Stories

Abstract: It was a busy summer. 1. Having raised the necessary endowment, the OEIS is now looking to hire a managing editor. 2. Dampening Down Diverging Series: making the harmonic series and others converge. 3. Covering a sequence (e.g. (n, prime(n))) with straight lines. 4. An innocent-looking definition leads to the Riesel and Sierpinski problems and some astronomical primes. (With thanks to M. Alekseyev, L. Blomberg, L. Brown, D. McCarty, B. McEachen, R. Sigrist, et al.)