[seqfan] Re: more on double factorials/Penson
franktaw at aim.com
franktaw at aim.com
Wed Oct 21 18:54:36 CEST 2009
It seems to me that it would be more confusing not to have the words
"double factorial" on these sequences. If you wanted to say "bisection
of double factorial numbers" instead of just "double factorial
numbers", I would have no problem with that.
Franklin T. Adams-Watters
-----Original Message-----
From: Karol PENSON <penson at lptl.jussieu.fr>
Dear Seqfans,
I am trying to clarify a little mess stirred by my remark. From what we
see below the ::::::::: line
A) the only sequence which really deserves the name "double
factorial
numbers " is A006882.
In this sequence a line should be added
which links it to the doublefactorial function of Maple, i.e.
A006882(n)=doublefactorial(n). This
line is conspicuously absent from A006882.
B) I propose , to avoid any confusion , not to use the term "double
factorial numbers" in referring to
A001147, to A000165 and to A001818, or rather to use the term
"subsequence of A006882" or
"bisection of A006882", (Neil , could you decide ?) .
Thanks to Richard Mathar and Maximilian Hasler for constructive
observations and remarks ,
best,
Karol A. Penson
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