2672672domain: NAppears in sequencesNumbers of the form p^4*q^5 where p and q are two distinct primes.at n=13A179702a(n) = 2*n^4.at n=34A244730Dirichlet g.f.: Product_{k>=2} 1 / (1 - k^(-s))^(k^4).at n=33A343284Dirichlet g.f.: Product_{k>=2} (1 + k^(-s))^(k^4).at n=33A343324