A044380 Numbers n such that string 4,8 occurs in the base 10 representation of n but not of n-1.

48, 148, 248, 348, 448, 480, 548, 648, 748, 848, 948, 1048, 1148, 1248, 1348, 1448, 1480, 1548, 1648, 1748, 1848, 1948, 2048, 2148, 2248, 2348, 2448, 2480, 2548, 2648, 2748, 2848, 2948, 3048, 3148, 3248, 3348, 3448, 3480