Annual Appeal: Please make a donation (tax deductible in USA) to keep the OEIS running. Over 4500 articles have referenced us, often saying "we would not have discovered this result without the OEIS".
%N n-1 is a palindrome in base 10, n+1 is a palindrome in base 17.
%A _Olivier Gérard_
%E More terms from Michel ten Voorde (seqfan(AT)tenvoorde.org)