Number Theory Is e Normal Identities for Linear Recurring Sequences The Half-Totient Tree Symmetric Pseudoprimes Primes of the Form 2^(k-1) + k Limit Cycles of xy (mod x+y) A Knot of Congruences Rounding Up to PI Fermat's Last Theorem for Cubes Digit Reversal Sums Leading to Palindromes Self-Similar Reverse-Sum Sequences N Plus the Prime Factors of N Sequence Partitionable Into Powers of 2 or 3 ...