Just a not too well thought out idea, but you could put
the values after a _DATA_ tag so that they're there to read
in the first time, e.g:
__DATA__
SQRT5|2.blahblahblah
SQRT2|1.blahblahblah
E|2.more blahblah
The logic to control the reading in is left up to you,
anyway, others seem to have a handle on part of that,
while I don't have the time at the moment. I don't
really like the AutoLoader solution, it seems nifty, but
then you get too many reports from people who install
the module incorrectly (just copying the pm file to a
directory in @INC, or using 'use lib',
when you really need to do the 'perl Makefile.PL, make...etc.),
and then ask "Why doesn't this work?".
And then again, a few extra 500 byte strings really shouldn't
make all that big of a difference...