A050278/9, where A050278 are the pandigital numbers.

Terms

a(0) =113717421a(1) =113717422a(2) =113717431a(3) =113717433a(4) =113717442a(5) =113717443a(6) =113717521a(7) =113717522a(8) =113717541a(9) =113717544a(10) =113717552a(11) =113717554a(12) =113717631a(13) =113717633a(14) =113717641a(15) =113717644a(16) =113717663a(17) =113717664a(18) =113717742a(19) =113717743a(20) =113717752