Numbers n such that string 1,4 occurs in the base 9 representation of n but not of n-1.

Terms

a(0) =13a(1) =94a(2) =117a(3) =175a(4) =256a(5) =337a(6) =418a(7) =499a(8) =580a(9) =661a(10) =742a(11) =823a(12) =846a(13) =904a(14) =985a(15) =1053a(16) =1147a(17) =1228a(18) =1309a(19) =1390a(20) =1471a(21) =1552a(22) =1575a(23) =1633a(24) =1714a(25) =1795a(26) =1876a(27) =1957a(28) =2038a(29) =2119