Annual Appeal: Please make a donation (tax deductible in USA) to keep the OEIS running. Over 5000 articles have referenced us, often saying "we discovered this result with the help of the OEIS".
Table of n, a(n) for n=0..51.
Cf. A043096, A000217, A050759.
Sequence in context: A046489 A277209 A089717 * A075057 A069792 A194153
Adjacent sequences: A050757 A050758 A050759 * A050761 A050762 A050763
Patrick De Geest, Sep 15 1999.