A086540 Numbers n such that n and n+1 both are members of A074997; i.e. on the one hand n-1 and n+1 have the same prime signature, on the other hand n and n+2 have the same prime signature.

18, 55, 248, 340, 348, 722, 850, 949, 1061, 1148, 1204, 1205, 1241, 1277, 1314, 1315, 1667, 1672, 2148, 2716, 2948, 2949, 3258, 3581, 3650, 3651, 4044, 4265, 4627, 4842, 5092, 5093, 5451, 5741, 5765, 6244, 6355, 6356, 6565, 6640, 6851, 6963, 7362, 7404