Cadenza - The world's longest English pi mnemonic. The Pi code - Read the digits of pi as English text, and see the hidden messages. Geometrical Patterns of Pi Digits - in which the 'Feynman point' plays a key role. Mari Numbers - A generalization of the above. Repdigit Polygonal Numbers - My paper from Neil Sloane's Journal of Integer Sequences .
All Numbers Are Interesting - A constructive demonstration.
Wild Narcissistic Numbers - Numbers equal to strange functions of their digits. Primeval numbers - Integers containing many embedded primes. Math and Music The Combinatorics of Musical Rhythm - see where Fibonacci comes into play. Hailstone music - generated by the Collatz Conjecture. My Alphametic Page - an extensive collection of original cryptarithms.