Very close to 2^n
Table of n, a(n) for n=0..29.
Sequence in context: A275073 A264701 A195904 * A023421 A098051 A329053
Adjacent sequences: A101330 A101331 A101332 * A101334 A101335 A101336
Jorge Coveiro, Dec 24 2004
Comments moved to new sequence A195904 by Jeremy Gardiner, Sep 25 2011