Numbers whose base-13 representation has exactly 4 runs.

Terms

a(0) =2210a(1) =2212a(2) =2213a(3) =2214a(4) =2215a(5) =2216a(6) =2217a(7) =2218a(8) =2219a(9) =2220a(10) =2221a(11) =2222a(12) =2223a(13) =2224a(14) =2226a(15) =2227a(16) =2228a(17) =2229a(18) =2230a(19) =2231a(20) =2232a(21) =2233a(22) =2234a(23) =2235a(24) =2236a(25) =2237a(26) =2238a(27) =2240a(28) =2241a(29) =2242