Function: mfEk
Section: modular_forms
C-Name: mfEk
Prototype: L
Help: mfEk(k): mf corresponding to the standard Eisenstein series
 E_k.
Doc: mf structure corresponding to the standard Eisenstein series $E_k$.
 \bprog
 ? mfcoefs(mfEk(8),4)
 %1 = [1, 480, 61920, 1050240, 7926240]
 @eprog
