330015

Appears in sequences

• Number of dissections of a convex polygon with n+3 sides that have exactly one triangle, and that triangle shares at least one side with the exterior polygon.at n=12A255197
• Expansion of x*(1-x)*(3-13*x+24*x^2-17*x^3-18*x^4+35*x^5-3*x^6-14*x^7+x^9) / (1-7*x+20*x^2-30*x^3+16*x^4+20*x^5-32*x^6+6*x^7+11*x^8-2*x^9-x^10).at n=13A323270