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Search: id:A046390
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| A046390 |
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Odd numbers with exactly 4 distinct prime factors. |
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+0
2
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| 1155, 1365, 1785, 1995, 2145, 2415, 2805, 3003, 3045, 3135, 3255, 3315, 3705, 3795, 3885, 3927, 4305, 4389, 4485, 4515, 4641, 4785, 4845, 4935, 5005, 5115, 5187, 5313, 5565, 5655, 5865, 6045, 6105, 6195, 6279, 6405, 6545, 6555, 6699, 6765, 6783, 7035
(list; graph; listen)
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OFFSET
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1,1
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LINKS
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T. D. Noe, Table of n, a(n) for n=1..1000
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MATHEMATICA
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f[n_]:=Last/@FactorInteger[n]=={1, 1, 1, 1}&&FactorInteger[n][[1, 1]]>2; lst={}; Do[If[f[n], AppendTo[lst, n]], {n, 8!}]; lst [From Vladimir Orlovsky (4vladimir(AT)gmail.com), Nov 23 2009]
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CROSSREFS
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Cf. A046317, A046406.
Sequence in context: A035761 A107557 A020382 this_sequence A147577 A088012 A046406
Adjacent sequences: A046387 A046388 A046389 this_sequence A046391 A046392 A046393
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KEYWORD
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nonn,new
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AUTHOR
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Patrick De Geest (pdg(AT)worldofnumbers.com), Jun 15 1998.
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