\documentclass[a4paper,12pt]{scrartcl}

\usepackage{tikz}
\usepackage{pgffor}
\usetikzlibrary{positioning}
\usetikzlibrary{calc}
\usepackage{fontspec}
\setmainfont[Scale=1.4]{Schwabacher}

\begin{document}
\tikzstyle{nnnode}=[draw,minimum width=2cm,minimum height=1cm,inner sep=0,outer sep=0]

\begin{tikzpicture}
	\foreach \y in {1,3,...,23} {%
		\node [nnnode](left\y) at ($ .8*(0,\y)$) {\textbf{\y}};%
		\pgfmathparse{int(\y + 1)} \node [nnnode,anchor=east] at (left\y.west) {\textbf{\pgfmathresult}};
	}%
\end{tikzpicture}

\end{document}