1000016domain: NAppears in sequencesPositive numbers k such that k and 6*k are anagrams in base 9 (written in base 9).at n=18A023083Binary and decimal representation of n concatenated.at n=15A087744a(n) = the smallest n-digit number with exactly 10 divisors, a(n) = 0 if no such number exists.at n=6A182679