B2⁢n+1⁡(x)=(-1)n+1⁢(2⁢n+1)⁢∫0∞sin⁡(2⁢π⁢x)cosh⁡(2⁢π⁢t)-cos⁡(2⁢π⁢x)⁢t2⁢n⁢ⅆ⁡t.