200203

Appears in sequences

• Lucky numbers that are decimal concatenations of n with n + 3.at n=19A032653
• Composite squarefree numbers n such that p(i)+3 divides n-3, where p(i) are the prime factors of n.at n=15A225713
• Numbers that require three steps to collapse to a single digit in base 4 (written in base 4).at n=27A253953