∑j=0n-1xj(j!)3=∫-1/2n-(1/2)xt(Γ⁡(t+1))3⁢ⅆ⁡t-∫𝒞1xt(Γ⁡(t+1))3⁢ⅆ⁡tⅇ-2⁢π⁢ⅈ⁢t-1+∫𝒞2xt(Γ⁡(t+1))3⁢ⅆ⁡tⅇ2⁢π⁢ⅈ⁢t-1,