246124

Appears in sequences

• G.f.: exp( Sum_{n>=1} (sigma(2*n) - sigma(n))*Lucas(n)*x^n/n ), where Lucas(n) = A000204(n) and sigma(n) = A000203(n) is the sum of divisors of n.at n=13A225524
• a(n) = n*(n^3 + 2*n^2 - 5*n + 10)/8.at n=37A294259