Many of the best researchers and writers in discrete mathematics come together in a volume inspired by Ron Graham.

1. Probabilizing Fibonacci numbers Persi Diaconis; 2. On the number of ON cells in cellular automata N. J. A. Sloane; 3. Search for ultraflat polynomials with plus and minus one coefficients Andrew Odlyzko; 4. Generalized Goncharov polynomials Rudolph Lorenz, Salvatore Tringall and Catherine H. Yan; 5. The digraph drop polynomial Fan Chung and Ron Graham; 6. Unramified graph covers of finite degree Hau-Wen Huang and Wen-Ching Winnie Li; 7. The first function and its iterates Carl Pomerance; 8. Erdos, Klarner, and the 3x + 1 problem Jeffrey C. Lagarias; 9. A short proof for an extension of the Erdos-Ko-Rado theorem Peter Frankl and Andrey Kupavskii; 10. The Haight-Ruzsa method for sets with more differences than multiple sums Melvyn B. Nathanson; 11. Dimension and cut vertices William T. Trotter, Bartosz Walczak and Ruidong Wang; 12. Recent results on partition regularity of infinite matrices Neil Hindman; 13. Some remarks on pi Christian Reiher, Vojtech Rodl and Mathias Schacht; 14. Ramsey classes with closure operations Jan Hubicka and Jaroslav Nesetril; 15. Borsuk and Ramsey type questions in Euclidean space Peter Frankl, Janos Pach, Christian Reiher and Vojtech Rodl; 16. Pick's theorem and sums of lattice points Karl Levy and Melvyn B. Nathanson; 17. Apollonian ring packings Adrian Bolt, Steve Butler and Espen Hovland; 18. Juggling and card shuffling meet mathematical fonts Erik D. Demaine and Martin L. Demaine; 19. Randomly juggling backwards Allen Knutson; 20. Explicit error bounds for lattice Edgeworth expansions J. P. Buhler, A. C. Gamst, Ron Graham and Alfred W. Hales.