Numbers n such that string 0,1 occurs in the base 10 representation of n but not of n-1.

Terms

a(0) =101a(1) =201a(2) =301a(3) =401a(4) =501a(5) =601a(6) =701a(7) =801a(8) =901a(9) =1001a(10) =1010a(11) =1101a(12) =1201a(13) =1301a(14) =1401a(15) =1501a(16) =1601a(17) =1701a(18) =1801a(19) =1901a(20) =2001a(21) =2010a(22) =2101a(23) =2201a(24) =2301a(25) =2401a(26) =2501a(27) =2601a(28) =2701a(29) =2801