How to write rhead only on the first page? Why does this code not work?
\documentclass[11pt,a4paper]{article}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{fancyhdr}
\lhead{}
\chead{}
\usepackage{amssymb}
\usepackage{atbegshi}
\rhead{AAAAAA}
\AtBeginShipoutFirst{\rhead{}}
\pagestyle{fancy}
\begin{document}
AAAAAAAA
\newpage
AAAAAAAAA
\end{document}
