54347662

Appears in sequences

• Number of strong elementary edge-subgraphs in Moebius ladder M_n.at n=20A020880
• Expansion of (2 + 2*x - 3*x^2) / (1 - 2*x - x^2 + x^3).at n=21A033304
• Sum of n-th powers of the three roots of x^3-2*x^2-x+1.at n=22A274975