Coefficients in expansion of Eisenstein series -q*E'_6.

Terms

a(0) =504a(1) =33264a(2) =368928a(3) =2130912a(4) =7877520a(5) =24349248a(6) =59298624a(7) =136382400a(8) =268953048a(9) =519916320a(10) =892872288a(11) =1559827584a(12) =2432718288a(13) =3913709184a(14) =5766344640a(15) =8728481664a(16) =12165343344a(17) =17750901168a(18) =23711133600a(19) =33306154560a(20) =43406592768a(21) =58929571008