[seqfan] Re: Correcting A002932 (n-step walks on square lattice)

Joseph S. Myers jsm at polyomino.org.uk
Mon Nov 22 19:56:56 CET 2010

On Tue, 23 Nov 2010, Douglas McNeil wrote:

> On Mon, Nov 22, 2010 at 9:24 PM, Joseph S. Myers <jsm at polyomino.org.uk> wrote:
> > The last term given of the sequence, 396204, disagrees with my
> > calculations; I get 396172 although my program agrees with the earlier
> > terms.  Before I make corrections (and extensions - I have eight more
> > terms) to this sequence, could someone confirm whether they get the figure
> > I do or the figure in the sequence (which is accurately transcribed from
> > the Fisher and Hiley reference)?
> A quick enumeration seems to agree with your value:
> [...]
> 13 167468
> 14 396172
> 15 932628
> 16 2201636

Thanks.  Since I now have confirmation of my figures, I've submitted 
A173380 with all my terms (up to a(22)), the references from A002932, a 
clarified sequence name and a note on the correction with a link to this 
discussion, and submitted an edit marking A002932 as dead (keeping only 
the reference which had the 396204 value, and removing the incorrect 

Note that Index entries pointing to A002932 should be changed to point to 
A173380 once the changes are in, if that doesn't happen automatically.

Joseph S. Myers
jsm at polyomino.org.uk

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