Expansion of e.g.f.: sech(arctan(x)*exp(x))=1-1/2!*x^2-6/3!*x^3-11/4!*x^4+100/5!*x^5...

A012419

Expansion of e.g.f.: sech(arctan(x)*exp(x))=1-1/2!*x^2-6/3!*x^3-11/4!*x^4+100/5!*x^5...

Terms

    a(0) =1a(1) =0a(2) =-1a(3) =-6a(4) =-11a(5) =100a(6) =995a(7) =2030a(8) =-45943a(9) =-568632a(10) =-1189145a(11) =54818082a(12) =845395901a(13) =1936128428a(14) =-142744278261

External references