Links for download: I.J. TANEJA, Single Digit Representations of Natural Numbers, 2015. I.J. TANEJA, Single Letter Representations of Natural Numbers, Palindromic Symmetries and Number Patterns, 2015. \item \textbf{I.J. TANEJA}, Single Letter Representations of Natural Numbers, 2015. I.J. TANEJA, Single Letter Fraction-Type Representations of Natural Numbers - I, 2017.