auto index random encounter tables

layout.sty

@@ -757,7 +757,7 @@ Roll & Result \\
   bottom=10pt,
   left=3pt,
   right=3pt,
-  code={\rowcolors{2}{}{gray!10}\setcounter{enc}{19}\setcounter{list}{18}}}
+  code={\index{Encounter Tables}\rowcolors{2}{}{gray!10}\setcounter{enc}{19}\setcounter{list}{18}}}
 
 \newcommand{\li}{\addtocounter{enc}{-1}\arabic{enc}&}
 \newcommand{\lii}{\addtocounter{list}{-1}\arabic{list}&}