A043224 Numbers n such that 0 and 9 occur juxtaposed in the base 10 representation of n but not of n-1.

90, 109, 190, 209, 290, 309, 390, 409, 490, 509, 590, 609, 690, 709, 790, 809, 890, 900, 990, 1009, 1090, 1109, 1190, 1209, 1290, 1309, 1390, 1409, 1490, 1509, 1590, 1609, 1690, 1709, 1790, 1809, 1890, 1900, 1990, 2009, 2090