126426

Appears in sequences

• Number of intersection points outside the n-gon of all lines through pairs of vertices of a regular n-gon.at n=35A146213
• Number of Hamiltonian cycles in C_8 X P_n.at n=4A180584
• Array read by antidiagonals: T(n,k) is the number of Hamiltonian cycles in the stacked prism graph P_n X C_k, n >= 1, k >= 2.at n=59A359855