<html><body><div style="color:#000; background-color:#fff; font-family:times new roman, new york, times, serif;font-size:12pt"><div>Dear pstricks <br></div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: times new roman,new york,times,serif; background-color: transparent; font-style: normal;"><br></div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: times new roman,new york,times,serif; background-color: transparent; font-style: normal;">I use to type many numerical sequences like this below. How can I control the arrows?</div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: times new roman,new york,times,serif; background-color: transparent; font-style: normal;">Any suggestion to control others variables to improve the look?</div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: times new roman,new york,times,serif; background-color: transparent; font-style: normal;"><br></div><div
style="color: rgb(0, 0, 0); font-size: 16px; font-family: times new roman,new york,times,serif; background-color: transparent; font-style: normal;">Many thanks,</div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: times new roman,new york,times,serif; background-color: transparent; font-style: normal;"><br></div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: times new roman,new york,times,serif; background-color: transparent; font-style: normal;">Carlos Macedo<br></div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: times new roman,new york,times,serif; background-color: transparent; font-style: normal;"><br></div>\documentclass{article}<br>\usepackage{pstricks-add}<br><br>\begin{document}<br><br>\begin{pspicture}(0,-0.7)(3.5,0.5)<br>%\psgrid<br>\rnode{A}{1} \quad%<br>\rnode{B}{3} \quad<br>\rnode{C}{5} \quad%<br>\rnode{D}{7}, \dots,
$(2n-1)$<br>\ncarc[arcangle=-40]{->}{A}{B}\tbput{\scriptsize{$+2$}}%<br>\ncarc[arcangle=-40]{->}{B}{C}\tbput{\scriptsize{$+2$}}%<br>\ncarc[arcangle=-40]{->}{C}{D}\tbput{\scriptsize{$+2$}}%<br>\end{pspicture}<br><br>\end{document}<br></div></body></html>