Numbers k such that string 1,8 occurs in the base 9 representation of k but not of k+1.

Terms

a(0) =17a(1) =98a(2) =161a(3) =179a(4) =260a(5) =341a(6) =422a(7) =503a(8) =584a(9) =665a(10) =746a(11) =827a(12) =890a(13) =908a(14) =989a(15) =1070a(16) =1151a(17) =1232a(18) =1313a(19) =1457a(20) =1475a(21) =1556a(22) =1619a(23) =1637a(24) =1718a(25) =1799a(26) =1880a(27) =1961a(28) =2042a(29) =2123