Annual Appeal: Please make a donation (tax deductible in USA) to keep the OEIS running. Over 5000 articles have referenced us, often saying "we discovered this result with the help of the OEIS".
Table of n, a(n) for n=1..49.
For example when 251 is reflected it becomes 521 which is also a prime, but a different one.
Sequence in context: A036960 A133783 A036958 * A032024 A131741 A277098
Adjacent sequences: A178314 A178315 A178316 * A178318 A178319 A178320
David Nacin, May 24 2010