[pstricks] How to improve the look of this numerical sequence

[Carlos Macedo]

Dear pstricks 


I use to type many numerical sequences like this  below. How can I control the arrows?
Any suggestion to control others variables to improve the look?

Many thanks,

Carlos Macedo

\documentclass{article}
\usepackage{pstricks-add}

\begin{document}

\begin{pspicture}(0,-0.7)(3.5,0.5)
%\psgrid
\rnode{A}{1} \quad%
\rnode{B}{3} \quad
\rnode{C}{5} \quad%
\rnode{D}{7}, \dots, $(2n-1)$
\ncarc[arcangle=-40]{->}{A}{B}\tbput{\scriptsize{$+2$}}%
\ncarc[arcangle=-40]{->}{B}{C}\tbput{\scriptsize{$+2$}}%
\ncarc[arcangle=-40]{->}{C}{D}\tbput{\scriptsize{$+2$}}%
\end{pspicture}

\end{document}
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