Numbers with exactly 3 4's in base 5 expansion.

Terms

a(0) =124a(1) =249a(2) =374a(3) =499a(4) =524a(5) =549a(6) =574a(7) =599a(8) =604a(9) =609a(10) =614a(11) =619a(12) =620a(13) =621a(14) =622a(15) =623a(16) =749a(17) =874a(18) =999a(19) =1124a(20) =1149a(21) =1174a(22) =1199a(23) =1224a(24) =1229a(25) =1234a(26) =1239a(27) =1244a(28) =1245a(29) =1246