A151987 Number of legal starting configurations in the glass worms (or vers de verres) game with n glasses.

1, 1, 3, 13, 64, 404, 2135, 21077, 111459, 1261637, 10767866, 111804384, 659105457, 18705101130

Offset

0,3

Comments

Suggested by a question from Eric Angelini.

See the Sequence Fans Mailing List link and also the Angelini link for further information.

It is conjectured that a(n)~(n+1)^(n+1)/exp(n). [From Dennis Hou, May 05 2010]

Links

Table of n, a(n) for n=0..13.

Eric Angelini, Vers de verres (Glass worms)

E. Angelini, Vers de verres (Glass worms) [Cached copy, with permission]

Sequence Fans Mailing List, Discussion about Glass Worms

Crossrefs

Cf. A151986.

Sequence in context: A200719 A065065 A020086 * A369796 A356485 A126149

Adjacent sequences: A151984 A151985 A151986 * A151988 A151989 A151990

Keyword

nonn,more

Author

Jacques Tramu, Mar 09 2009

Extensions

Offset corrected by Joseph Myers, Sep 07 2009

a(9) to a(13) from Joseph Myers, Sep 08 2009

Status

approved