Numbers having four 5's in base 10.

Terms

a(0) =5555a(1) =15555a(2) =25555a(3) =35555a(4) =45555a(5) =50555a(6) =51555a(7) =52555a(8) =53555a(9) =54555a(10) =55055a(11) =55155a(12) =55255a(13) =55355a(14) =55455a(15) =55505a(16) =55515a(17) =55525a(18) =55535a(19) =55545a(20) =55550a(21) =55551a(22) =55552a(23) =55553a(24) =55554a(25) =55556a(26) =55557a(27) =55558a(28) =55559a(29) =55565