Numbers having three 5's in base 10.

Terms

a(0) =555a(1) =1555a(2) =2555a(3) =3555a(4) =4555a(5) =5055a(6) =5155a(7) =5255a(8) =5355a(9) =5455a(10) =5505a(11) =5515a(12) =5525a(13) =5535a(14) =5545a(15) =5550a(16) =5551a(17) =5552a(18) =5553a(19) =5554a(20) =5556a(21) =5557a(22) =5558a(23) =5559a(24) =5565a(25) =5575a(26) =5585a(27) =5595a(28) =5655a(29) =5755