1000800010domain: NAppears in sequencesSmallest n-digit palindromic multiple of n with a digit sum that is also a multiple of n. For n = 10k it is sufficient that the multiple is palindromic with leading zeros ignored. 0 if no such number exists.at n=9A084017Numbers k such that k and k^2 use only the digits 0, 1, 6 and 8.at n=20A136878