\documentclass[12pt]{article} 

\usepackage[paper=a4paper,landscape]{geometry}
\usepackage{recurrence} 

\begin{document} 

\section{Start}

%\tracingmacros=1
   \NewRecDef{f[0]=1,
              f[1]=1,
              f[i]=f[i-1]+f[i-2]}


\begin{tt}
\begin{tabular}{ll}
   f   & \meaning\f
\\ f:n & \expandafter\meaning\csname f:n\endcsname
\\ recurrence\_f\_0:x & \expandafter\meaning\csname recurrence_f_0:x\endcsname
\\ recurrence\_f\_1:x & \expandafter\meaning\csname recurrence_f_1:x\endcsname
\\ recurrence\_f\_2:x & \expandafter\meaning\csname recurrence_f_2:x\endcsname
\\ recurrence\_f\_3:x & \expandafter\meaning\csname recurrence_f_3:x\endcsname
\end{tabular}
\end{tt}

% \f{2}

\end{document}

