B2⁢m2⁢n+2⁡(q)B22⁢n+2⁡(q)=(-1)m(m!)2⁢(q4)m⁢q⁢π⁢(1+O⁡(m-1))wI′⁡(12⁢π;b2⁢n+2⁡(q),q).