Numbers whose maximal base-9 run length is 4.

Terms

a(0) =820a(1) =1640a(2) =2460a(3) =3280a(4) =4100a(5) =4920a(6) =5740a(7) =6560a(8) =6561a(9) =7380a(10) =7382a(11) =7383a(12) =7384a(13) =7385a(14) =7386a(15) =7387a(16) =7388a(17) =8201a(18) =9021a(19) =9841a(20) =10661a(21) =11481a(22) =12301a(23) =13121a(24) =13122a(25) =13942a(26) =14760a(27) =14761a(28) =14763a(29) =14764