2002002domain: NAppears in sequencesPalindromic admirable numbers.at n=30A109759In base 3, 0, together with numbers of the form i00j00k00m00... where i = 1 or 2 and j,k,m,... are 0, 1, or 2.at n=42A261660Base-10 super-weak Skolem-Langford numbers.at n=12A339803