Expansion of e.g.f.: sec(tanh(x)+log(x+1))=1+4/2!*x^2-6/3!*x^3+83/4!*x^4-460/5!*x^5...

A013127

Expansion of e.g.f.: sec(tanh(x)+log(x+1))=1+4/2!*x^2-6/3!*x^3+83/4!*x^4-460/5!*x^5...

Terms

    a(0) =1a(1) =0a(2) =4a(3) =-6a(4) =83a(5) =-460a(6) =5374a(7) =-52962a(8) =711833a(9) =-9731160a(10) =156311784a(11) =-2676262710a(12) =50867352939

External references