Numbers n such that string 1,8 occurs in the base 10 representation of n but not of n-1.

Terms

a(0) =18a(1) =118a(2) =180a(3) =218a(4) =318a(5) =418a(6) =518a(7) =618a(8) =718a(9) =818a(10) =918a(11) =1018a(12) =1118a(13) =1180a(14) =1218a(15) =1318a(16) =1418a(17) =1518a(18) =1618a(19) =1718a(20) =1800a(21) =1918a(22) =2018a(23) =2118a(24) =2180a(25) =2218a(26) =2318a(27) =2418a(28) =2518a(29) =2618