提重複者 唯一 (12689)

D2{=INDEX(A:A,MIN(IF((COUNTIF(D$1:D1,A$2:A$16)=0)*(COUNTIF(A:A,A$2:A$16)>1),ROW($2:$16),99)))&""

另解{=INDEX(A:A,SMALL(IF((COUNTIF(A:A,A$2:A$16)>1)*(MATCH(A$2:A$16,A:A,)=ROW($2:$16)),ROW($2:$16),99),ROW(A1)))&""