A043201 Numbers n such that 3 and 4 occur juxtaposed in the base 9 representation of n but not of n-1.

31, 39, 112, 120, 193, 201, 274, 279, 351, 363, 436, 444, 517, 525, 598, 606, 679, 687, 760, 768, 841, 849, 922, 930, 1003, 1008, 1080, 1092, 1165, 1173, 1246, 1254, 1327, 1335, 1408, 1416, 1489, 1497, 1570, 1578, 1651, 1659