I presume this is related to something called "The Superbowl", whatever that is.......
This is one way to achieve what you want without helper cells.....
In A1
=INT(RAND()*10)
in A2
=SMALL(IF(ISNA(MATCH({0,1,2,3,4,5,6,7,8,9},A$1:A1,0)),{0,1,2,3,4,5,6,7,8,9}),INT(RAND()*(10-ROWS(A$2:A2))+1))
confirmed with CTRL+SHIFT+ENTER and copied down to A10
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