Expansion of tanh(x)*cos(sin(x)).A009825Expansion of tanh(x)*cos(sin(x)).Terms a(0) =1a(1) =-5a(2) =61a(3) =-1217a(4) =38137a(5) =-1753245a(6) =112141173a(7) =-9583252569External referencesoeis: A009825