Crazy Representations of Natural Numbers 0 to 10000 Using Triangular Numbers

This work brings natural numbers from 0 to 10.000 written in two different forms. Increasing and decreasing orders of 1 to 9 and 9 to 1. This is done using Triangular numbers along with basic operations. Previously, the author worked with same numbers using only basic operations. For the numbers some extra operations are used, such as, square-root, factorial, etc. The previous work is up to number 300.000. For more details refer author's site.  This kind of work using Triangular numbers is never seen before. The results are up to number 10.000.