Crazy Representations of Natural Numbers From 20001 to 40000

Inder J. Taneja
This paper brings natural numbers from 20001 to 40000 written in \textbf{ascending} and \textbf{descending} orders of 1 to 9. The numbers are obtained by using basic operations, and \textbf{factorial}. For previous results see author's works [work1, work2, work3]. For more details and comments see author's site link
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