arctan(arctanh(x)*log(x+1))=2/2!*x^2-3/3!*x^3+16/4!*x^4-50/5!*x^5...

A012701

arctan(arctanh(x)*log(x+1))=2/2!*x^2-3/3!*x^3+16/4!*x^4-50/5!*x^5...

Terms

    a(0) =0a(1) =0a(2) =2a(3) =-3a(4) =16a(5) =-50a(6) =128a(7) =756a(8) =-20064a(9) =298656a(10) =-3561408a(11) =38990160a(12) =-310756800a(13) =467943840a(14) =66887172480

External references