Expansion of e.g.f.: sech(sech(x)*log(x+1))=1-1/2!*x^2+3/3!*x^3+6/4!*x^4-60/5!*x^5...

A012877

Expansion of e.g.f.: sech(sech(x)*log(x+1))=1-1/2!*x^2+3/3!*x^3+6/4!*x^4-60/5!*x^5...

Terms

    a(0) =1a(1) =0a(2) =-1a(3) =3a(4) =6a(5) =-60a(6) =-120a(7) =3150a(8) =-4592a(9) =-195048a(10) =1007520a(11) =18349320a(12) =-224812632a(13) =-1637441520a(14) =47577070632a(15) =97108316760

External references