Seminars & Colloquia Calendar
Coordination Sequences, Planing Numbers, and Other Recent Sequences
Neil Sloane, The OEIS Foundation and Rutgers University
Location: Hill 705
Date & time: Thursday, 15 November 2018 at 5:00PM - 5:48PM
Abstract: Take a periodic tiling of the plane and consider its associated graph. The coordination sequence with respect to a node P gives the number of nodes that are n edges away from P. Chaim Goodman-Strauss and I have a new and simple method for obtaining generating functions for such sequences, which will be illustrated with several examples. There are a number of interesting open questions. I will also discuss Lenormand's operation that planes down numbers (e.g., 231 becomes 27).
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