[seqfan] Neusis construction - A122254/A048136 with/out 11,22?

Georg.Fischer georg.fischer at t-online.de
Wed Feb 19 17:42:47 CET 2020

Hi Seqfans,

cites "modified versions" of
   A122254 Numbers with 3-smooth Euler's totient (A000010)
   1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 13, 14
and the complementary
   A048136 Tomahawk-nonconstructible n-gons.
   *11, 22*, 23, 25, 29

and they refer to a publication from 2014 where
Benjamin and Snyder prove that the 11-gon (and hence
the 22-gon) can also be constructed with neusies (cf.
the links below).

I was tempted to change both sequences right away,
but I should better ask the mathematical gurus

- Are 3-smooth Euler's totient, neusis and tomahawk
   construction equivalent?
- Is it reasonable to move 11 and 22 from A048136
   to A122254, and to augment the comments, or
- Should our 2 sequences be copied to new ones, and
   Wikipedia be changed accordingly?

Regards - Georg

Wikipedia, <a 

Elliot Benjamin, C. Snyder, <a 
href="https://dx.doi.org/10.1017/S0305004113000753">On the construction 
of the regular hendecagon by marked ruler and compass</a>, Mathematical 
Proceedings of the Cambridge Philosophical Society 156.3 (May 2014), pp. 

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