Invitation: celebrating 50 years of OEIS, 250000 sequences, and Sloane's 75th, there will be a conference at DIMACS, Rutgers, Oct 9-10 2014.
Table of n, a(n) for n=1..20.
M. Keith, Integers containing many embedded primes
Sequence in context: A005113 A239196 A072857 * A210849 A216155 A011919
Adjacent sequences: A119532 A119533 A119534 * A119536 A119537 A119538
N. J. A. Sloane, Jan 25 2008
More terms extracted from A072857 - R. J. Mathar, Jun 11 2010