[seqfan] Re: Discrepancy between definition and terms in A257481?
Brad Klee
bradklee at gmail.com
Mon May 18 17:27:49 CEST 2015
Hi Felix,
The sequence is cross-referenced with A182619.
"Number of vertices that are connected to two edges in a spiral without
holes constructed with n hexagons."
It could be that the "chain" is a linear object. For n=12 the chain would
spiral around to enclose 3 of its "links" with the other 9 circles.
I agree it is confusing, and could maybe use an illustration.
Thanks,
Brad
On Mon, May 18, 2015 at 3:20 AM, Felix Fröhlich <felix.froe at googlemail.com>
wrote:
> Dear SeqFans
>
> the definition says "a(n) is the maximal number of circles that can be
> enclosed by a chain of n circles". So why does the example say "For a(7),
> one circle can be completely enclosed by six surrounding circles"? Isn't
> that an example for the value of a(6)? Same goes for the example for a(10).
> Shouldn't a(10), by the definition of the sequence, give the maximum number
> of circles that can be surrounded by a chain of ten circles? Or am I simply
> completely misunderstanding something about the sequence? Can someone
> clarify how the definition, example and terms of the sequence correlate to
> each other?
>
> Best regards
> Felix Fröhlich
>
> _______________________________________________
>
> Seqfan Mailing list - http://list.seqfan.eu/
>
More information about the SeqFan
mailing list