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=0..76.
Sequence in context: A160573 A141418 A130499 * A029065 A263253 A162157
Adjacent sequences: A020907 A020908 A020909 * A020911 A020912 A020913