cos(arctanh(x)+log(x+1))=1-4/2!*x^2+6/3!*x^3-19/4!*x^4+20/5!*x^5...

A013160

cos(arctanh(x)+log(x+1))=1-4/2!*x^2+6/3!*x^3-19/4!*x^4+20/5!*x^5...

Terms

    a(0) =1a(1) =0a(2) =-4a(3) =6a(4) =-19a(5) =20a(6) =-70a(7) =-1050a(8) =7645a(9) =-125640a(10) =1074400a(11) =-15186050a(12) =154663825a(13) =-2302431300a(14) =27387957350a(15) =-445100087250

External references