A043257 Numbers n such that 6 and 9 occur juxtaposed in the base 10 representation of n but not of n-1.

69, 96, 169, 196, 269, 296, 369, 396, 469, 496, 569, 596, 669, 690, 769, 796, 869, 896, 960, 996, 1069, 1096, 1169, 1196, 1269, 1296, 1369, 1396, 1469, 1496, 1569, 1596, 1669, 1690, 1769, 1796, 1869, 1896, 1960, 1996, 2069