Unless you use your own mechanism of generating and maintaining the nu bering sequence you cannot. The inbuilt autonnunber datatype is there to provide a means of ensuring a unique value for use within that table, it should not have any meaning outside the system itself.
If you need a sequential numbering system then roll your own using a function that returns such a value. Wheter you use dmax or a SQL statement is upto you. In a multi user system you may also need to use record locking
I'd rather be riding on the Tiger 800 or the Norton