T(0) = 1, T(1) = 1, (T(n + 2)) / (n + 1) = T(n + 1) + T(n) + (2n^2 + 3n + 2) / (n + 1) + subfactorial(n + 1) (n + 2) + subfactorial(n) (n + 1)

• Lenguaje natural
• Entrada matemática