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Table of n, a(n) for n=1..31.
Sequence in context: A258006 A019854 A025936 * A048376 A053422 A000461
Adjacent sequences: A158846 A158847 A158848 * A158850 A158851 A158852
Paul Curtz, Mar 28 2009
Edited by R. J. Mathar, Apr 04 2009