Expansion of e.g.f.: exp(tanh(x)+tan(x))=1+2*x+4/2!*x^2+8/3!*x^3+16/4!*x^4+64/5!*x^5...

A013133

Expansion of e.g.f.: exp(tanh(x)+tan(x))=1+2*x+4/2!*x^2+8/3!*x^3+16/4!*x^4+64/5!*x^5...

Terms

    a(0) =1a(1) =2a(2) =4a(3) =8a(4) =16a(5) =64a(6) =448a(7) =2816a(8) =14592a(9) =80896a(10) =705536a(11) =7278592a(12) =65245184a(13) =532070400a(14) =5385535488a(15) =71008190464a(16) =910402060288

External references