Numbers n such that string 7,3 occurs in the base 9 representation of n but not of n-1.

Terms

a(0) =66a(1) =147a(2) =228a(3) =309a(4) =390a(5) =471a(6) =552a(7) =594a(8) =633a(9) =714a(10) =795a(11) =876a(12) =957a(13) =1038a(14) =1119a(15) =1200a(16) =1281a(17) =1323a(18) =1362a(19) =1443a(20) =1524a(21) =1605a(22) =1686a(23) =1767a(24) =1848a(25) =1929a(26) =2010a(27) =2052a(28) =2091a(29) =2172