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=2..59.
Sequence in context: A191056 A141639 A232558 * A136144 A086304 A193947
Adjacent sequences: A024888 A024889 A024890 * A024892 A024893 A024894