[seqfan] Re: Boubaker sequences.
maximilian.hasler at gmail.com
Sun Dec 6 19:26:23 CET 2009
AFAICS sequence http://oeis.org/classic/A160242 is
%N A160242 a(n)=1 if n is a square, a(n)=2 else.
and should have a(0)=1 pre-pended.
Even if the relation with the B-polynomials is clarified in a way that
enables to judge whether it is correct or not, this should not be the
definition, but a comment ;
and it should be added that the row lengths are 2r+1
(starting with row r=0 : 1 ; r=1 : 1,2,2 ; r=2 : 1,2,2,2,2 ; etc)
PS: I somehow feel uneasy writing to the whole list, but the message
had no information in it enabling me to know who is concerned. (I did
not find an earlier occurrence of "Boubaker sequences" in my mailbox.)
I would appreciate very much if ongoing discussions on a particular
subject (Boubaker poly. ; Florentinos(?) ; Deleting unworthy sequences
; ...) could be moved to a separate "channel" which interested people
can join without bothering the whole list.
(If there's no better one, a possibility would be the discussion board
of the OEIS group on facebook.)
Once such a discussion among specialists has reached a noteworthy
result or consensus, the list could again be informed about.
On Sun, Dec 6, 2009 at 11:59 AM, N. J. A. Sloane <njas at research.att.com> wrote:
> I edited A162180 following Joerg's suggestions. I did not touch A160242,
> which seems to require further work to see what is going on.
> The entries A135929 and A138034 seem OK.
> Seqfan Mailing list - http://list.seqfan.eu/
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