367524domain: NAppears in sequencesa(n) = binomial(5*n+8, 4)/5 for n >= 0.at n=15A238473G.f.: exp( Sum_{n>=1} sigma_2(n)*sigma_3(n)/sigma(n) * x^n / n ), where sigma_{k}(n) equals the sum of the k-th powers of the divisors of n.at n=11A320416