20633241

Appears in sequences

• Number of maximum matchings in the n-Moebius ladder M_n.at n=35A020878
• Expansion of (1 - x + 3*x^3 - 2*x^4 - 3*x^5)/(1 - 2*x + x^3).at n=35A048162
• a(n) is the number of perfect matchings of an edge-labeled 2 X (2n+1) Mobius grid graph.at n=17A162483