75457domain: NAppears in sequencesPalindromic in bases 3 and 10.at n=15A007633n-th largest palindrome whose digit sum is n.at n=27A082265Palindromes of the form 3n + 1 where n is also a palindrome: palindromes arising in A083829.at n=25A083830Maximal intervals of balanced binary trees in the Tamari lattices.at n=28A272372