[seqfan] Re: Need help with puzzling sequence A118980

Neil Sloane njasloane at gmail.com
Wed Aug 14 04:56:14 CEST 2019

Peter,  No, I totally missed A117938 and the other sequences he submitted
around the same time!  I'll add comments pointing out the relation you

Well, since as you say, A118980 had a cross-reference to A117938, I must
have looked at it.
But its definition is pretty hard to understand and I probably did no more
than glance at it
before returning to working on A118980!

Best regards

Neil J. A. Sloane, President, OEIS Foundation.
11 South Adelaide Avenue, Highland Park, NJ 08904, USA.
Also Visiting Scientist, Math. Dept., Rutgers University, Piscataway, NJ.
Phone: 732 828 6098; home page: http://NeilSloane.com
Email: njasloane at gmail.com

On Tue, Aug 13, 2019 at 10:20 PM Peter Munn <techsubs at pearceneptune.co.uk>

> On Mon, August 12, 2019 11:33 pm, Neil Sloane wrote:
> > By looking more carefully at Richard Mathar's work from 2011, I
> > was able to straighten out the mess.
> > There is a new sequence A309220 that replaces the missing "A118979",
> > and A118980 is now well-defined and edited. Ditto for A118981.
> A quick postscript, and Neil may have already taken this into account: I
> just searched for [example:1,5,18,36,34] and got both the new sequence and
> A117938, another Gary Adamson sequence from 2006, with the same table but
> with an extra column/row. All the way since A118980 revision #1 it has had
> a CROSSREF Cf. ..., A117938,... although A118980 made no other reference
> to A117938.
> Could A117938 have led to the original A118979 being considered
> unnecessary?
> [...]
> Also, in reply to
> > On Mon, Aug 12, 2019 at 6:21 PM Fred Lunnon <fred.lunnon at gmail.com>
> wrote:
> [...]
> >> What I intended to say was that I suspect the author made an elementary
> >> error right at the top of the table: it should have commenced
> [...]
> I found R. J. Mathar's comment in A117937 about the author's "definition
> of binomial transforms" informative.
> Best Regards,
> Peter
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