Expansion of e.g.f.: sech(arctanh(x)+log(x+1))=1-4/2!*x^2+6/3!*x^3+45/4!*x^4-300/5!*x^5...

A013166

Expansion of e.g.f.: sech(arctanh(x)+log(x+1))=1-4/2!*x^2+6/3!*x^3+45/4!*x^4-300/5!*x^5...

Terms

    a(0) =1a(1) =0a(2) =-4a(3) =6a(4) =45a(5) =-300a(6) =-630a(7) =18270a(8) =-44415a(9) =-1428840a(10) =13608000a(11) =106964550a(12) =-3044747475a(13) =2748645900a(14) =674525001150

External references