1069443domain: NAppears in sequencesPseudo-powers to base 3: numbers k that are not powers of 3 such that k divides 2^k + 1.at n=28A016057Terms k of A006521 such that 2*k is a term of A124240.at n=37A289257Numbers k that divide the smallest number whose sum of digits is k.at n=40A342810