Search: id:A075819
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%I A075819
%S A075819 30,42,66,70,78,102,110,114,130,138,154,170,174,182,186,190,222,230,
%T A075819 238,246,258,266,282,286,290,310,318,322,354,366,370,374,402,406,410,
%U A075819 418,426,430,434,438,442,470,474,494,498,506,518,530,534,574,582,590
%N A075819 Even squarefree numbers with exactly 3 prime factors.
%C A075819 This sequence first differs from A053858 at 2310=2*3*5*7*11, which is 
               in A053858 but not in this sequence.
%e A075819 30=2*3*5 and 42=2*3*7 are even, squarefree and have 3 prime factors.
%p A075819 ts_3_sod := proc(n); if (numtheory[bigomega](n)=3 and numtheory[mobius](n)=-1 
               and type(n,even)='true') then RETURN(n); fi end: a3sod := [seq(ts_3_sod(i), 
               i=1..2500)]: a3sod;
%Y A075819 Cf. A053858.
%Y A075819 Sequence in context: A007304 A160350 A053858 this_sequence A034683 A087248 
               A046401
%Y A075819 Adjacent sequences: A075816 A075817 A075818 this_sequence A075820 A075821 
               A075822
%K A075819 easy,nonn
%O A075819 1,1
%A A075819 Jani Melik (jani_melik(AT)hotmail.com), Oct 13 2002
%E A075819 Edited by Dean Hickerson (dean.hickerson(AT)yahoo.com), Oct 21 2002

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