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..52.
Sequence in context: A109356 A061251 A166604 * A043173 A043953 A139954
Adjacent sequences: A039347 A039348 A039349 * A039351 A039352 A039353