No Repeating Digits | 1602

Continued from here

Thanks to u/__soulembrace for the assist

Counting in integers, base 10, but... no digit appears more than once. Examples 9,10,12 or 108,109,120,123.

Get: 3601

Unlike others, this has an endpoint in the form of 9 876 543 210 - and so if we reach that we can be very satisfied.