Concluding remarks
Using the representation of Fibonacci number as a sum of multinomial coefficients over partitions with odd parts, we obtain several infinite families of double inequalities involving the generating function of the number of partitions with odd parts, the generating function for the number of odd divisors and the generating function of the number of partitions in two distinct odd parts. We note that when the problem of finding a closed form for the generating function of Qk(n) for arbitrary k will be solved, then further, stronger inequality families will follow by the methods used in this article.