[Plugin: Google XML Sitemaps] Error in Line 302 when building a sitemap

I get this error when I try to build a sitemap in version 3.2.1. I don’t know if this was in previous versions or not:

Fatal error: Allowed memory size of 16777216 bytes exhausted (tried to allocate 35 bytes) in /hsphere/local/home/jfburrow/boxturtlebulletin.com/btb/wp-includes/plugin.php on line 302

According to the Sitemaps settings page, everything looks like it’s set up right:

# The last known memory usage of the script was 16.25MB, the limit of your server is 128M.
# The last known execution time of the script was 0.85 seconds, the limit of your server is 120 seconds.
# The script stopped around post number 1110 (+/- 100)
# If you changed something on your server or blog, you should rebuild the sitemap manually.
# If you encounter any problems with the build process you can use the debug function to get more information.

http://wordpress.org/extend/plugins/google-sitemap-generator/