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..53.
Sequence in context: A055041 A061819 A017197 * A069538 A052217 A119507
Adjacent sequences: A051366 A051367 A051368 * A051370 A051371 A051372
Miklos SZABO (mike(AT)ludens.elte.hu)