Annual Appeal: Please make a donation (tax deductible in USA) to keep the OEIS running. Over 4500 articles have referenced us, often saying "we would not have discovered this result without the OEIS".
Table of n, a(n) for n=1..19.
Cf. A000312, A067734-A067736, A068183-A068190.
Sequence in context: A046449 A203211 A214823 * 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