0,2
Table of n, a(n) for n=0..8.
David Applegate and N. J. A. Sloane, The Gift Exchange Problem (arXiv:0907.0513, 2009)
Cf. A144512, A048775, A144511, A144662.
Sequence in context: A078868 A186874 A202201 * A192767 A032734 A083625
Adjacent sequences: A147981 A147982 A147983 * A147985 A147986 A147987
nonn
N. J. A. Sloane, May 13 2009
approved