Numbers having three 4's in base 10.

Terms

a(0) =444a(1) =1444a(2) =2444a(3) =3444a(4) =4044a(5) =4144a(6) =4244a(7) =4344a(8) =4404a(9) =4414a(10) =4424a(11) =4434a(12) =4440a(13) =4441a(14) =4442a(15) =4443a(16) =4445a(17) =4446a(18) =4447a(19) =4448a(20) =4449a(21) =4454a(22) =4464a(23) =4474a(24) =4484a(25) =4494a(26) =4544a(27) =4644a(28) =4744a(29) =4844