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Suggested by a question from Eric Angelini.
See the Sequence Fans Mailing List link and also the Angelini link for further information.
Table of n, a(n) for n=1..20.
Eric Angelini, Vers de verres (Glass worms)
Sequence Fans Mailing List, Discussion about Glass Worms
Sequence in context: A049983 A168112 A170894 * A101472 A087160 A107427
Adjacent sequences: A151983 A151984 A151985 * A151987 A151988 A151989
Jacques Tramu, Mar 09 2009
a(11) corrected by Joseph Myers, Sep 07 2009
Edited and terms a(12) to a(20) from Sep 2009 discussion added by Joseph Myers, Nov 12 2010