140209

Appears in sequences

• Semiprimes whose prime factors are distinct and the reversal of one factor is equal to the other.at n=8A083815
• Product of n-th prime and n-th prime written backwards.at n=34A133019
• Smallest composite m such that m and the smallest prime divisor of m begin with n.at n=13A197817
• Semiprimes whose prime factors are the digit reversal of each other.at n=21A376746