Table of n, a(n) for n=1..4.
C. K. Caldwell, Prime Curios
2161 and 211 (delete a digit from 2161) are both primes with period 30, so 2161 is in the sequence.
Cf. A116075, A116076.
Sequence in context: A154822 A061335 A159238 * A035872 A126831 A161998
Adjacent sequences: A116071 A116072 A116073 * A116075 A116076 A116077
G. L. Honaker and Jud McCranie, Feb 03 2006