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".
19 steps to see a repeat.
Table of n, a(n) for n=0..81.
Cf. A087712, A098282.
Sequence in context: A232571 A203096 A210822 * A209541 A053903 A254333
Adjacent sequences: A144912 A144913 A144914 * A144916 A144917 A144918
N. J. A. Sloane, Feb 18 2009