rewrite to /index.php

Hi,

Q: I need a rewrite of http://www.domain.com to http://www.domain.com/index.php

Why: I show random posts on my blog and I installed 1blogcacher. I added “index.php” to the denied list of pages for caching. When I access http://www.domain.com/index.php then I DO see a random post, when I access http://www.domain.com then I see the cached website (and NO random posts).

I added

RewriteEngine On
RewriteRule ^ /index.php [R=301,L]

to the .htaccess but then it is giving a loop error.

Please advice!