OFFSET
1,2
LINKS
Diana Mecum, Table of n, a(n) for n = 1..41
EXAMPLE
31,331,15331,7515331, ... are all primes.
CROSSREFS
KEYWORD
base,nonn
AUTHOR
Amarnath Murthy, Aug 15 2005
EXTENSIONS
More terms from Diana L. Mecum, Jun 26 2007
STATUS
approved