y^2=4*x^3+21*x^2+28*x Cremona Label = 49a1 s:=y*(x^2+7*x+7)/2+(7*x^3+35*x^2+49*x+16)/2 Monodromy [7,331,331]-type x=(142)(356)(7), y=(175)(346)(2), z=(1234567) Reference: Elkies' article on Klein Quartic Designed (and Computed) by K.Hoshino and H.Nakamura (Okayama Univ.)