[seqfan] Re: definition of pandigital numbers

[franktaw at netscape.net]

Once you've said "permutations", you don't need to add "(restricted 
such that each digit appears exactly once)"; this is implied by the 
word "permutation". If you feel you need to include it, stick "i.e.," 
or "that is," in front of it; otherwise you'll confuse people who think 
you are adding an additional restriction, and wonder what non-standard 
meaning you are using for "permutation".

And please don't capitalize "permutation" when it occurs in the middle 
of a sentence.

Franklin T. Adams-Watters

-----Original Message-----
From: Jeremy Gardiner <jeremy.gardiner at btinternet.com>

...

The first 9!=362,880 terms of this sequence are Permutations of the 
digits
1-9 (restricted such that each digit appears exactly once) with
a(9!)=987654321.

...