196252domain: NAppears in sequencesa(n) = ceiling((n+1/n)^4).at n=20A197903Expansion of Product_{k>0} theta_3(q^k), where theta_3() is the Jacobi theta function.at n=44A320067Dirichlet g.f.: Product_{k>=2} (1 + k^(-s))^(k^4).at n=15A343324