sech(arcsinh(x)*exp(x))=1-1/2!*x^2-6/3!*x^3-15/4!*x^4+60/5!*x^5...

A012595

sech(arcsinh(x)*exp(x))=1-1/2!*x^2-6/3!*x^3-15/4!*x^4+60/5!*x^5...

Terms

    a(0) =1a(1) =0a(2) =-1a(3) =-6a(4) =-15a(5) =60a(6) =975a(7) =5390a(8) =-10143a(9) =-563976a(10) =-5982945a(11) =-9594398a(12) =788690001a(13) =14618418100a(14) =85743956207

External references