406406

Appears in sequences

• Pronic numbers A002378 (AA) that can be divided into two equal strings (A).at n=1A161356
• Positions of 4's in A347381.at n=59A347394
• Integers k such that k = Sum k/(p_i + j), where p_i are the prime factors of k (with multiplicity). Case j = -5.at n=18A380927