Maximal base 5 run length is 4.

Terms

a(0) =156a(1) =312a(2) =468a(3) =624a(4) =625a(5) =780a(6) =782a(7) =783a(8) =784a(9) =937a(10) =1093a(11) =1249a(12) =1250a(13) =1406a(14) =1560a(15) =1561a(16) =1563a(17) =1564a(18) =1718a(19) =1874a(20) =1875a(21) =2031a(22) =2187a(23) =2340a(24) =2341a(25) =2342a(26) =2344a(27) =2499a(28) =2500a(29) =2656