=IF(ROWS(A$1:A1)<=COUNTA($A$1:$A$100),INDEX($A$1:$ A$100,MATCH(SMALL(IF($A$1*:$A$100<"",COUNTIF($A$1 :$A$100,"<"&$A$1:$A$100)),ROWS(A$1:A1)),IF($A$1:$A $*100<"",COUNTIF($A$1:$A$100,"<"&$A$1:$A$100)),0) ),"")

Hello,

That formula does not work for numbers and not for "text numbers"
different from '1.

It is not necessary to use an array formula if you are willing to use
a helper column:
http://sulprobil.com/html/sorting.html

Regards,
Bernd