127720

Appears in sequences

• Expansion of (1 + x - x^3 - 2*x^4)/(1 - x^2 - x^3 - x^4 - x^5).at n=30A109544
• Number of simple labeled graphs on n+2 nodes with exactly n connected components that are trees or cycles.at n=30A215862
• Number of edges in a complete bipartite graph where the vertices in the two parts are placed on opposite sides of a parabola at integer y coordinates y = 1, 2, ...n.at n=22A392444