this version uses the services of
The (Combinatorial) Object Server.
use LWP::Simple;
my $cosder = "http://www.theory.csc.uvic.ca/~cos/per/perm/perm.pl.cgi?
+program=Derange&output1=true&n=";
sub derangements
{
map[@_[split/, /]],get($cosder.@_)=~/<TD ALIGN=CENTER>(.*?) <BR>/g
}
print "@$_\n" for derangements( qw( aleph beth gimel daleth ) );
Unfortunately, they don't appear to have an xml or text/plain option.
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