191445

Appears in sequences

• Number of intersection points of all lines through pairs of vertices of a regular n-gon.at n=35A146212
• A146212(2*n).at n=17A347321
• Number of vertices in graph G_n formed by taking a regular n-gon with all its chords extended to infinity (the n-th graph in A344857) and inverting it in its circumscribing circle.at n=35A383461