題組內容

5. Consider the equation c1+ c2 +c3+C4 = 23 where -3 ≤ c1,-2 ≤c2, -2 ≤c3 ≤0, and 2 ≤c4.

(b) The number of integer solutions to the above equation equals to the coeficient of 61e8af2e0cb5f.jpg of the above generating function. What is n?