  We compute the index of 6d N=(1,0) theories on S^5 x R containing vector and
hypermultiplets. We only consider the perturbative sector without instantons.
By compactifying R to S^1 with a twisted boundary condition and taking the
small radius limit, we derive the perturbative partition function on a squashed
S^5. The 1-loop partition function is represented in a simple form with the
triple sine function.
