%I
%S 1,14,69,188,465,882,1645,2648,4257,6170,9273,12564,17485,22778,30585,
%T 38288,50031,61074,77311,91580,114009,134750,164634,192456
%N Number of equilateral triangles bounded by the sides and diagonals of a regular 3ngon.
%H Antreas Hatzipolakis and Giovanni Resta, <a href="http://list.seqfan.eu/pipermail/seqfan/2013April/011012.html">Number of Equilateral Triangles in Regular 3ngon</a>, Postings to the Sequence Fans Mailing List, Apr 08 2013
%H Giovanni Resta, <a href="/A238822/a238822.png">Illustration for a(3) = 69</a>
%Y Cf. A006561.
%K nonn,nice,more
%O 1,2
%A _N. J. A. Sloane_, Mar 07 2014
%E a(6)a(24) from _Luca Petrone_, Mar 28 2017
