Recently Okounkov proved Nekrasovs conjecture expressing the partition function of K-theoretic DT invariants of the Hilbert scheme of points Hilb($\mathbb C^3$, points) on affine 3-space as an explicit plethystic exponential. We generalise Nekrasovs formula to higher rank, where the Quot scheme of finite length quotients of the trivial rank $r$ bundle replaces Hilb($\mathbb C^3$,points). This proves a conjecture of Awata-Kanno. Specialising to cohomological invariants, we obtain the statement of Szabos conjecture. We discuss some further applications if time permits. This is joint work with Nadir Fasola and Sergej Monavari.