User:Borealbear

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Suppose a positive integer with all digits non-zero is considered $\textit{almost unique}$ if there are fewer than $5$ permutations of its digits. For example, $122$ is $\textit{almost unique}$ since it has $3$ permutations,( $122$ , $212$ , and $221$ ), while $123$ is not since it has $6$ permutations, ( $123$ , $132$ , $213$ , $231$ , $312$ , $321$ ). How many $\textit{almost unique}$ numbers less than $1000000$ are there?

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User:Borealbear