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Minimum number of unit length rods needed to construct a rigid regular n-gon.
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%I #24 May 07 2023 15:14:23

%S 3,19,31,11,35,31,51,55,155,49

%N Minimum number of unit length rods needed to construct a rigid regular n-gon.

%C The terms in this sequence are the best known solutions and they may not be optimal.

%H Erich Friedman, <a href="https://erich-friedman.github.io/mathmagic/0100.html">Problem of the Month (January 2000)</a>

%H Ed Pegg, <a href="https://math.stackexchange.com/questions/3954719">Is this braced heptagon a rigid graph?</a>, Mathematics Stack Exchange, December 2020.

%H Kaylee Weatherspoon, <a href="https://scholarcommons.sc.edu/senior_theses/616">Structure of Extremal Unit Distance Graphs</a>, Senior Thesis, Honors College, Univ. S. Carolina - Columbia (2023). See p. 28.

%K hard,more,nonn

%O 3,1

%A _Arkadiusz Wesolowski_, Nov 01 2012

%E a(7) updated according to Jeremy Tan's answer to Ed Pegg's question by _Andrey Zabolotskiy_, Dec 21 2020

%E Name clarified by _Pontus von Brömssen_, May 07 2023