A147984 Column 5 of A144512.

1, 2431, 4061871, 7528988476, 15467641899285, 34155922905682979, 79397199549271412737, 191739533381111401455478, 476872353039366288373555323

Offset

0,2

Links

Table of n, a(n) for n=0..8.

Moa Apagodu, David Applegate, N. J. A. Sloane, and Doron Zeilberger, Analysis of the Gift Exchange Problem, arXiv:1701.08394, 2017.

David Applegate and N. J. A. Sloane, The Gift Exchange Problem (arXiv:0907.0513, 2009)

Crossrefs

Cf. A144512, A048775, A144511, A144662.

Sequence in context: A345174 A345175 A202201 * A229871 A192767 A341286

Adjacent sequences: A147981 A147982 A147983 * A147985 A147986 A147987

Keyword

nonn

Author

N. J. A. Sloane, May 13 2009

Status

approved