I have Mathematica 11.0. I would like to see power series coefficients of a q-series (having q-Pochhammer symbols in the summands) together in order to look for certain arithmetic information. Earlier, when I had Mathematica 9, I used to give the command Series[Sum[q^(n^2 + n)/QPochhammer[q, q^2, n + 1], {n, 0, 10}], {q, 0, 10}]Read more