Expansion of e.g.f.: sech(cosh(x)*log(x+1))=1-1/2!*x^2+3/3!*x^3-18/4!*x^4+60/5!*x^5...

A012763

Expansion of e.g.f.: sech(cosh(x)*log(x+1))=1-1/2!*x^2+3/3!*x^3-18/4!*x^4+60/5!*x^5...

Terms

    a(0) =1a(1) =0a(2) =-1a(3) =3a(4) =-18a(5) =60a(6) =-60a(7) =-1890a(8) =31472a(9) =-319032a(10) =2369280a(11) =-6374280a(12) =-209401368a(13) =5594400240a(14) =-90523285944

External references