545721

Appears in sequences

• a(n) = n*(27*n^3 + 22*n^2 - 21*n - 16)/12.at n=22A172085
• Expansion of (1-3*x+x^2)*(1-2*x)/(1-9*x+28*x^2-35*x^3+15*x^4-x^5).at n=10A221859