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Table of n, a(n) for n=1..19.
Cf. A000312, A067734-A067736, A068183-A068190.
Sequence in context: A203211 A214823 A275517 * A177775 A192935 A024055
Adjacent sequences: A068184 A068185 A068186 * A068188 A068189 A068190
Labos Elemer, Feb 18 2002
Edited by Dean Hickerson and Henry Bottomley, Mar 07 2002