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..19.
Cf. A070861, A060957.
Sequence in context: A140097 A105227 A000258 * A180707 A062569 A089057
Adjacent sequences: A070860 A070861 A070862 * A070864 A070865 A070866
Amarnath Murthy, May 16 2002
Corrected and extended by Lior Manor May 26 2002