tμ-1∗f=∑s=0n-1(-1)s⁢asμ⋅s!⁢Ds+1⁡(tμ⁢(ln⁡t-γ-ψ⁡(μ+1)))-∑s=1nds⁢Γ⁡(μ)Γ⁡(μ-s+1)⁢tμ-s+tμ-1∗fn