Numbers n such that string 5,9 occurs in the base 10 representation of n but not of n+1.

Terms

a(0) =59a(1) =159a(2) =259a(3) =359a(4) =459a(5) =559a(6) =599a(7) =659a(8) =759a(9) =859a(10) =959a(11) =1059a(12) =1159a(13) =1259a(14) =1359a(15) =1459a(16) =1559a(17) =1599a(18) =1659a(19) =1759a(20) =1859a(21) =1959a(22) =2059a(23) =2159a(24) =2259a(25) =2359a(26) =2459a(27) =2559a(28) =2599a(29) =2659