(-1)k⁢ζ(k)⁡(1-s)=2(2⁢π)s⁢∑m=0k∑r=0m(km)⁢(mr)⁢(ℜ⁡(ck-m)⁢cos⁡(12⁢π⁢s)+ℑ⁡(ck-m)⁢sin⁡(12⁢π⁢s))⁢Γ(r)⁡(s)⁢ζ(m-r)⁡(s),