αk⁡(ν)=(4⁢ν2-12)⁢(4⁢ν2-32)⁢⋯⁢(4⁢ν2-(2⁢k+1)2)(k+1)!⁢(14⁢ν2-12+14⁢ν2-32+⋯+14⁢ν2-(2⁢k+1)2).