Invitation: celebrating 50 years of OEIS, 250000 sequences, and Sloane's 75th, there will be a conference at DIMACS, Rutgers, Oct 9-10 2014.
1,1
No other terms below 10^6.
Zaremba conjectured that A141823, A141832, A141833, and this sequence form a partition of the integers >1.
Is this sequence finite? If so, is it complete?
Table of n, a(n) for n=1..3.
A. Kontorovich, From Apollonius to Zaremba: local-global phenomena in thin orbits, 2012. - From N. J. A. Sloane, Dec 25 2012
Sequence in context: A145003 A097645 A153333 * A072368 A116138 A227268
Adjacent sequences: A195898 A195899 A195900 * A195902 A195903 A195904
nonn,bref,more,hard
Max Alekseyev, Sep 25 2011
approved