A051803 Numbers with nonzero multiplicative digital root 1.

0, 1, 10, 11, 25, 52, 55, 100, 101, 110, 111, 125, 152, 155, 205, 215, 250, 251, 455, 502, 505, 512, 515, 520, 521, 545, 550, 551, 554, 555, 888, 1000, 1001, 1010, 1011, 1025, 1052, 1055, 1100, 1101, 1110, 1111, 1125, 1152