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=2..74.
Sequence in context: A101776 A189721 A202304 * A196176 A121536 A080405
Adjacent sequences: A047742 A047743 A047744 * A047746 A047747 A047748
N. J. A. Sloane