a sequence related to arctan(1/2)/Pi.

[Simon Plouffe]

hello, 

 I present myself, Simon Plouffe, I collaborate also with E.I.S
and I read the seqfan postings. 

I have found a new sequence related to the computation of
arctan(1/2)/Pi, namely A004715, details are available at the
Journal of Integer Sequences or from my home page at
http://www.lacim.uqam.ca/plouffe/ 

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Pour ceux qui parlent francais, j'ai un resume d'une conference
en format pdf qui parle de cette construction et de cette 
nouvelle suite a
http://www.lacim.uqam.ca/plouffe/constr.pdf

Simon Plouffe