[seqfan] Re: Rings of regular polygons

Andrew Weimholt andrew.weimholt at gmail.com
Sun Mar 26 23:59:47 CEST 2017

On Sun, Mar 26, 2017 at 2:15 PM, Peter Munn <techsubs at pearceneptune.co.uk>

> If you defined it as including all those where neighbouring polygons
> shared an edge, that is including 6 triangles around a point etc., I think
> the sequence might be A023645, the number of divisors of n less than n/2.
> So, I think your a(13) term should be 1.
> Peter
I agree. 26 13-gons DO form a ring.
Something is wrong with the 13-gons in the his PDF (uneven edge lengths


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