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

A012663

Expansion of e.g.f.: sech(tanh(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) =1043a(7) =2702a(8) =-47287a(9) =-697656a(10) =-2382009a(11) =65150690a(12) =1227815037a(13) =4876299948a(14) =-197964434917

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