Numbers n such that string 5,4 occurs in the base 9 representation of n but not of n+1.

Terms

a(0) =49a(1) =130a(2) =211a(3) =292a(4) =373a(5) =449a(6) =454a(7) =535a(8) =616a(9) =697a(10) =778a(11) =859a(12) =940a(13) =1021a(14) =1102a(15) =1178a(16) =1183a(17) =1264a(18) =1345a(19) =1426a(20) =1507a(21) =1588a(22) =1669a(23) =1750a(24) =1831a(25) =1907a(26) =1912a(27) =1993a(28) =2074a(29) =2155