
LINKS

Table of n, a(n) for n=3..8.
Nathaniel Johnston, Illustration of a(4), a(5), and a(6)
Vladimir Letsko, Mathematical Marathon at VSPU, Problem 102 (in Russian)
Vladimir Letsko, Illustration of a(8) = 49 (the regular octagon provides another example)
V. A. Letsko and M. A. Voronina, Classification of convex polygons, Grani Poznaniya, 1(11), 2011 (in Russian).
V. A. Letsko and M. A. Voronina, Illustration of a(7) = 29
B. Poonen and M. Rubinstein, The number of intersection points made by the diagonals of a regular polygon, SIAM J. on Discrete Mathematics, Vol. 11, No. 1, 135156 (1998).
B. Poonen and M. Rubinstein, The number of intersection points made by the diagonals of a regular polygon, arXiv version, which has fewer typos than the SIAM version.
