memoir: pagestyle for index start on second page of index

Question

I'm trying to change the page style for the index, but I can't find out why that does only become effective on page 2 of the index:

\documentclass{memoir} 
\usepackage{kantlipsum} 

\makepagestyle{index} 
  \makeheadrule{index}{\textwidth}{\normalrulethickness} 
  \makeevenhead{index}{\rightmark}{}{\leftmark} 
  \makeoddhead{index}{\rightmark}{}{\leftmark} 
  \makeevenfoot{index}{Index - \thepage}{even}{even} 
  \makeoddfoot{index}{odd}{odd}{Index - \thepage} 

\makeindex 
\begin{document} 
\chapter{One} 
\kant[1-5] 
\newcount\ind\ind=1\loop\index{\the\ind}\advance\ind1\ifnum\ind<400\repeat 
\clearpage 
\pagestyle{index} 
\printindex 
\end{document} 

Page 3 of the output show a centered 3 instead of: odd odd Index - 3

Answer 1

I believe \printindex does the equivalent of a chapter start, so the first page is in chapter style.

The best way to fix this, I think, is to set an alias for the chapter pagestyle:

\clearpage 
\aliaspagestyle{chapter}{index}
\pagestyle{index} 
\printindex