You could try cache the files onto your server once the numbers are generated. I'm not sure if that's against the TOS either. The issue you're going to have is that you need a chart for any number combination you might encounter.
-- You received this message because you are subscribed to the Google Groups "Google Chart API" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/google-chart-api?hl=en.
