A103653 - OEIS

%I #4 Mar 31 2012 13:20:57

%S 90,126,198,234,270,300,306,342,350,378,414,522,525,550,558,588,594,

%T 650,666,702,738,774,810,825,846,850,918,950,954,975,980,1026,1062,

%U 1078,1098,1134,1150,1206,1242,1274,1275,1278,1314,1422,1425,1450,1452,1494

%N Members of A085924 that are not members of A072774.

%C All terms shown have exactly 3 distinct prime factors. a(101) = 2940 =2^2*3*5*7^2 is the first member with more than 3. a(107) = 3072 = 2^10*3 is the first member with less than 3.

%e 90 = 2^1*3^2*5^1 is a member because the concatenation of the exponents is 121.

%K base,easy,nonn,less

%O 1,1

%A _David Wasserman_, Feb 11 2005