Before revision:  In the Nussinov energy model, where each base pair contributes -1 towards the energy of the structure, locally optimal structures are exactly the  saturated structures, for which we have previously shown that asymptotically, there are 1.07427\cdot n^{-3/2} \cdot 2.35467^n many saturated structures for a sequence of length n.
After revision:  In the Nussinov energy model, where each base pair contributes -1 towards the energy of the structure, locally optimal structures are exactly the  saturated structures, for which we have previously shown that asymptotically, there are 1.07427\cdot n^{-3/2} \cdot 2.35467^n many saturated structures for a sequence of length n.