exp(tanh(x)+arctan(x))=1+2*x+4/2!*x^2+4/3!*x^3-16/4!*x^4-88/5!*x^5...

A013140

exp(tanh(x)+arctan(x))=1+2*x+4/2!*x^2+4/3!*x^3-16/4!*x^4-88/5!*x^5...

Terms

    a(0) =1a(1) =2a(2) =4a(3) =4a(4) =-16a(5) =-88a(6) =64a(7) =2496a(8) =4096a(9) =-106624a(10) =-480896a(11) =6875136a(12) =54717440a(13) =-673392640a(14) =-7775895552a(15) =99550288896

External references