A044342 Numbers n such that string 1,0 occurs in the base 10 representation of n but not of n-1.

10, 100, 210, 310, 410, 510, 610, 710, 810, 910, 1000, 1210, 1310, 1410, 1510, 1610, 1710, 1810, 1910, 2010, 2100, 2210, 2310, 2410, 2510, 2610, 2710, 2810, 2910, 3010, 3100, 3210, 3310, 3410, 3510, 3610, 3710, 3810, 3910