A044738 Numbers n such that string 2,5 occurs in the base 10 representation of n but not of n+1.

25, 125, 225, 259, 325, 425, 525, 625, 725, 825, 925, 1025, 1125, 1225, 1259, 1325, 1425, 1525, 1625, 1725, 1825, 1925, 2025, 2125, 2225, 2259, 2325, 2425, 2599, 2625, 2725, 2825, 2925, 3025, 3125, 3225, 3259, 3325, 3425