Getallenleer   Digit gerelateerde Getallen Digital Root Equidigital Number Evil Number Factorion Gelfand's Question Happy Number Harshad Number Hoax Number Kaprekar Constant Kaprekar Number Kaprekar Routine Kaprekar Sequence Katadrome Keith Number Langford's Problem Least Significant Bit Metadrome Multiplicative Digital Ro... Multiplicative Persistence Narcissistic Number Odious Number Pandigital Pandigital Fraction Pandigital Number Persistent Number Rational Amicable Pair RATS Sequence Recurring Digital Invaria... Repdigit Repunit Reversal Reverse-Then-Add Sequence Rhonda Number

RECHTS   Rudin-Shapiro Sequence Saunders Graphic Self-Descriptive Number Self Number Smith Brothers Smith Number Sort-Then-Add Sequence Sum-Product Number Super-d Number Tetradic Number Trimorphic Number Undulating Number Unhappy Number Vampire Number VR Number Wallis's Problem Wasteful Number Zerofree