Expansion of sin(tanh(x))*x.A009525Expansion of sin(tanh(x))*x.Terms a(0) =0a(1) =2a(2) =-12a(3) =222a(4) =-7672a(5) =416410a(6) =-32324292a(7) =3382216502a(8) =-457713511280External referencesoeis: A009525