Numbers having four 3's in base 5.

Terms

a(0) =468a(1) =1093a(2) =1718a(3) =1968a(4) =2093a(5) =2218a(6) =2268a(7) =2293a(8) =2318a(9) =2328a(10) =2333a(11) =2338a(12) =2340a(13) =2341a(14) =2342a(15) =2344a(16) =2348a(17) =2368a(18) =2468a(19) =2968a(20) =3593a(21) =4218a(22) =4843a(23) =5093a(24) =5218a(25) =5343a(26) =5393a(27) =5418a(28) =5443a(29) =5453