  In this article the cohomological Donaldson-Thomas theory of local
multibanana threefolds is computed using Descombes' hyperbolic localisation
formula. The resulting expression is precisely given by the elliptic genus of
the moduli space of framed instanton sheaves. As part of the proof, an
infinite-wedge-space trace formula is computed for the elliptic genus of the
moduli space of framed instanton sheaves.
