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=0..53.
Eric Weisstein's World of Mathematics, Digitaddition
Sequence in context: A196806 A094944 A108682 * A196145 A021003 A196313
Adjacent sequences: A031210 A031211 A031212 * A031214 A031215 A031216
Eric W. Weisstein