A043136 Numbers n such that 0 and 6 occur juxtaposed in the base 7 representation of n but not of n-1.

42, 55, 91, 104, 140, 153, 189, 202, 238, 251, 287, 294, 336, 349, 385, 398, 434, 447, 483, 496, 532, 545, 581, 594, 630, 637, 679, 692, 728, 741, 777, 790, 826, 839, 875, 888, 924, 937, 973, 980, 1022, 1035, 1071, 1084, 1120