Expansion of e.g.f.: sech(arcsinh(x)+log(x+1))=1-4/2!*x^2+6/3!*x^3+69/4!*x^4-330/5!*x^5...

A013080

Expansion of e.g.f.: sech(arcsinh(x)+log(x+1))=1-4/2!*x^2+6/3!*x^3+69/4!*x^4-330/5!*x^5...

Terms

    a(0) =1a(1) =0a(2) =-4a(3) =6a(4) =69a(5) =-330a(6) =-2700a(7) =29925a(8) =164745a(9) =-4116420a(10) =-9894150a(11) =791943075a(12) =-1224167175a(13) =-199738989450

External references