cosh(arctanh(x)*cos(x))=1+1/2!*x^2-3/4!*x^4+45/6!*x^6+2457/8!*x^8...
A012747
cosh(arctanh(x)*cos(x))=1+1/2!*x^2-3/4!*x^4+45/6!*x^6+2457/8!*x^8...
Terms
- a(0) =1a(1) =1a(2) =-3a(3) =45a(4) =2457a(5) =161625a(6) =20549397a(7) =3457938757a(8) =772773915313
External references
- oeis: A012747