102435domain: NAppears in sequencesPositive numbers k such that k and 4*k are anagrams in base 6 (written in base 6).at n=9A023066Numbers k such that (2^k + 1)^2 - 2 = 4^k + 2^(k+1) - 1 is prime.at n=41A091513Numbers with exactly six distinct base-10 digits.at n=30A220076