arctanh(arctan(x)+log(x+1))=2*x-1/2!*x^2+16/3!*x^3-54/4!*x^4+876/5!*x^5...

A012968

arctanh(arctan(x)+log(x+1))=2*x-1/2!*x^2+16/3!*x^3-54/4!*x^4+876/5!*x^5...

Terms

    a(0) =0a(1) =2a(2) =-1a(3) =16a(4) =-54a(5) =876a(6) =-6630a(7) =122904a(8) =-1558536a(9) =33455520a(10) =-601095600a(11) =14941817856a(12) =-346714064928

External references