Numbers n such that string 2,9 occurs in the base 10 representation of n but not of n-1.

Terms

a(0) =29a(1) =129a(2) =229a(3) =290a(4) =329a(5) =429a(6) =529a(7) =629a(8) =729a(9) =829a(10) =929a(11) =1029a(12) =1129a(13) =1229a(14) =1290a(15) =1329a(16) =1429a(17) =1529a(18) =1629a(19) =1729a(20) =1829a(21) =1929a(22) =2029a(23) =2129a(24) =2229a(25) =2290a(26) =2329a(27) =2429a(28) =2529a(29) =2629