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..39.
Sequence in context: A262799 A183965 A031639 * A031729 A001726 A109487
Adjacent sequences: A031546 A031547 A031548 * A031550 A031551 A031552
David W. Wilson