Many excellent designs for a new banner were submitted. We will use the best of them in rotation.
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
Link fixed by Charles R Greathouse IV Aug 13 2009
More terms extracted from A072857 - R. J. Mathar, Jun 11 2010