OFFSET
1,1
EXAMPLE
2161 and 211 (delete a digit from 2161) are both primes with period 30, so 30 is in the sequence.
CROSSREFS
KEYWORD
base,nonn
AUTHOR
G. L. Honaker and Jud McCranie, Feb 03 2006
EXTENSIONS
a(5)-a(30) from Giovanni Resta, Jan 06 2014
STATUS
approved