Numbers whose maximal base-10 run length is 3.

Terms

a(0) =111a(1) =222a(2) =333a(3) =444a(4) =555a(5) =666a(6) =777a(7) =888a(8) =999a(9) =1000a(10) =1110a(11) =1112a(12) =1113a(13) =1114a(14) =1115a(15) =1116a(16) =1117a(17) =1118a(18) =1119a(19) =1222a(20) =1333a(21) =1444a(22) =1555a(23) =1666a(24) =1777a(25) =1888a(26) =1999a(27) =2000a(28) =2111a(29) =2220