1666737

Appears in sequences

• Pseudo-powers to base 3: numbers k that are not powers of 3 such that k divides 2^k + 1.at n=31A016057
• Products of the 5th power of a prime and a distinct prime of the 3rd power (p^5*q^3).at n=23A179671
• Terms k of A006521 such that 2*k is a term of A124240.at n=41A289257