3486961557domain: NAppears in sequencesCoefficients in q-expansion of (3*E_4^3 + 2*E_6^2 - 5*E_2*E_4*E_6)/1584, where E_2, E_4, E_6 are the Eisenstein series shown in A006352, A004009, A013973, respectively.at n=9A282254a(n) = n * sigma_n(n).at n=8A321295