**University of Miami**

Department of Mathematics

Department of Mathematics

**Lecture SeriesSpring Semester 2020**

**Some Significant Combinatorial Sequences**

**presented by**

**Professor Richard Stanley**

*Arts and Sciences Distinguished Scholar*

University of Miami

**5:00pm**

Tuesday, February 25, 2020

Ungar Building, Room 402

Tuesday, March 3, 2020

Ungar Building, Room 402

Tuesday, March 17, 2020**[CANCELED]**

Tuesday, March 24, 2020**Online**

Tuesday, March 31, 2020**Online**

Tuesday, April 7, 2020**Online**

Tuesday, April 14, 2020**Join Online** or Call in: 1.646.558.8656 (Meeting ID: 671 001 974)

**Abstract**

Combinatorics is replete with sequences of positive integers that spill over into many other areas. We will survey the basic properties of some of these sequences, focusing on their enumerative properties and their connections with algebra and geometry. These sequences include the following:

Fibonacci numbers | 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, ... |

Euler numbers | 1, 2, 5, 16, 61, 272, 1385, 7936, 50521, ... |

Catalan numbers | 1, 2, 5, 14, 42, 132, 429, 1430, 4862, ... |

(n+1)^{n-1} | 1, 1, 3, 16, 125, 1296, 16807, 262144, ... |

**Richard P. Stanley**

*Member of the National Academy of Sciences*

*Member of the National Academy of Sciences*

Richard Stanley has been a College of Arts and Sciences Distinguished Scholar in Mathematics at the University of Miami since 2014. He was the Norman Levinson Professor of Applied Mathematics at MIT and has been Professor Emeritus there since 2018. Professor Stanley's pioneering contributions to combinatorics and its connections with other areas of mathematics revolutionized the field. He was awarded the George Pólya Prize in Applied Combinatorics in 1975 from the Society of Industrial and Applied Mathematics, the Leroy P. Steele Prize in 2001 from the American Mathematical Society, and the Rolf Schock Prize in Mathematics in 2003 from the Royal Swedish Academy of Sciences. Professor Stanley held a Guggenheim Fellowship and is a fellow of the American Academy of Arts & Sciences and a member of the National Academy of Sciences.