  In 1986, Andrews [2,3] studied the function $\sigma(q)$ from Ramanujan's
"Lost" Notebook, and made several conjectures on its Fourier coefficients
$S(n)$, which count certain partition ranks. In 1988, Andrews-Dyson-Hickerson
[5] famously resolved these conjectures, relating the coefficients $S(n)$ to
the arithmetic of $\mathbb Q(\sqrt{6})$; this relationship was further
expounded upon by Cohen [9] in his work on Maass waveforms, and was more
recently extended by Zwegers [43] and by Li and Roehrig [25]. A closer
inspection of Andrews' original work on $\sigma(q)$ reveals additional related
functions and conjectures, which we study in this paper. In particular, we
study the function $v_1(q)$, also from Ramanujan's "Lost" Notebook, a Nahm-type
sum with partition-theoretic Fourier coefficients $V_1(n)$, and prove two of
Andrews' conjectures on $V_1(n)$ which are parallel to his original conjectures
on $S(n)$. Our methods differ from those used in [5], and require a blend of
novel techniques inspired by Garoufalidis' and Zagier's recent work on
asymptotics of Nahm sums [13,14], with classical techniques including the
Circle Method in Analytic Number Theory; our methods may also be applied to
determine the asymptotic behavior of other Nahm-type sums of interest which are
not amenable to classical techniques. We also offer explanations of additional
related conjectures of Andrews, ultimately connecting the asymptotics of
$V_1(n)$ to the arithmetic of $\mathbb Q(\sqrt{-3})$.
