160520

Appears in sequences

• Expansion of x*(1+5*x-2*x^3)/(1-6*x^2+2*x^4).at n=13A249221
• a(n) = Sum_{d|n} (n-d)^tau(n/d).at n=20A345274
• Indices of the triangular numbers in A189475.at n=39A358417