sech(sinh(x)*exp(x))=1-1/2!*x^2-6/3!*x^3-23/4!*x^4-20/5!*x^5...

A012523

sech(sinh(x)*exp(x))=1-1/2!*x^2-6/3!*x^3-23/4!*x^4-20/5!*x^5...

Terms

    a(0) =1a(1) =0a(2) =-1a(3) =-6a(4) =-23a(5) =-20a(6) =743a(7) =9422a(8) =64433a(9) =19032a(10) =-7391889a(11) =-131529310a(12) =-1204724391a(13) =2412614724a(14) =343942765463

External references