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".
R. J. Mathar, Table of n, a(n) for n = 1..299
Index entries for sequences related to pseudoprimes
Sequence in context: A231558 A101826 A262052 * A183778 A250448 A221427
Adjacent sequences: A020248 A020249 A020250 * A020252 A020253 A020254
David W. Wilson