Numbers whose base-5 representation contains exactly one 1 and three 4's.

Terms

a(0) =249a(1) =549a(2) =609a(3) =621a(4) =749a(5) =999a(6) =1124a(7) =1149a(8) =1199a(9) =1224a(10) =1229a(11) =1239a(12) =1244a(13) =1245a(14) =1247a(15) =1248a(16) =1499a(17) =1799a(18) =1859a(19) =1871a(20) =2124a(21) =2424a(22) =2484a(23) =2496a(24) =2549a(25) =2609a(26) =2621a(27) =2649a(28) =2699a(29) =2724