E2⁢n+1⁡(x)=(-1)n+1⁢4⁢∫0∞cos⁡(π⁢x)⁢sinh⁡(π⁢t)cosh⁡(2⁢π⁢t)-cos⁡(2⁢π⁢x)⁢t2⁢n+1⁢ⅆ⁡t.