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=1..42.
Sequence in context: A238903 A271079 A091094 * A004133 A180415 A050228
Adjacent sequences: A116097 A116098 A116099 * A116101 A116102 A116103
Philippe LALLOUET (philip.lallouet(AT)wanadoo.fr), Apr 11 2007
Edited and extended by R. J. Mathar, Jan 23 2008