513315domain: NAppears in sequencesPalindromic Super-3 Numbers.at n=18A032751Palindromes which are the concatenation of 3 or more terms of an arithmetic sequence with nonzero difference.at n=28A062564Smallest palindromic multiple of 2n-1 beginning with the digit string of 2n-1; or 0 if no such number exists.at n=25A083964