A044336 Numbers n such that string 0,4 occurs in the base 10 representation of n but not of n-1.

104, 204, 304, 404, 504, 604, 704, 804, 904, 1004, 1040, 1104, 1204, 1304, 1404, 1504, 1604, 1704, 1804, 1904, 2004, 2040, 2104, 2204, 2304, 2404, 2504, 2604, 2704, 2804, 2904, 3004, 3040, 3104, 3204, 3304, 3404, 3504