A043248 Numbers n such that 4 and 7 occur juxtaposed in the base 10 representation of n but not of n-1.

47, 74, 147, 174, 247, 274, 347, 374, 447, 470, 547, 574, 647, 674, 740, 774, 847, 874, 947, 974, 1047, 1074, 1147, 1174, 1247, 1274, 1347, 1374, 1447, 1470, 1547, 1574, 1647, 1674, 1740, 1774, 1847, 1874, 1947, 1974, 2047