sech(log(x+1)-arctanh(x))=1-3/4!*x^4-90/6!*x^6-4095/8!*x^8...

A013304

sech(log(x+1)-arctanh(x))=1-3/4!*x^4-90/6!*x^6-4095/8!*x^8...

Terms

    a(0) =1a(1) =0a(2) =-3a(3) =-90a(4) =-4095a(5) =-283500a(6) =-28534275a(7) =-4001347350a(8) =-754083705375

External references