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A051270
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Numbers that are divisible by exactly 5 different primes.
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17
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2310, 2730, 3570, 3990, 4290, 4620, 4830, 5460, 5610, 6006, 6090, 6270, 6510, 6630, 6930, 7140, 7410, 7590, 7770, 7854, 7980, 8190, 8580, 8610, 8778, 8970, 9030, 9240, 9282, 9570, 9660, 9690, 9870, 10010, 10230, 10374, 10626, 10710, 10920, 11130
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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LINKS
| T. D. Noe, Table of n, a(n) for n=1..1000
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EXAMPLE
| 2730=2*3*5*7*13 is the first nontrivial 5-prime factor number following the 5th primorial, 2310=2*3*5*7*11
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MATHEMATICA
| lst={}; Do[If[Length[FactorInteger[n]]==5, (*Print[n]; *)AppendTo[lst, n]], {n, 3*10^4}]; lst [From Vladimir Orlovsky (4vladimir(AT)gmail.com), Aug 21 2008]
Select[Range[12000], PrimeNu[#]==5&] (* From Harvey P. Dale, Feb 13 2012 *)
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CROSSREFS
| A000961, A007774, A000977, A002110, A033992, A033993.
Sequence in context: A031636 A031546 A060231 * A046387 A136154 A076252
Adjacent sequences: A051267 A051268 A051269 * A051271 A051272 A051273
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KEYWORD
| nonn,changed
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AUTHOR
| Labos E. (labos(AT)ana.sote.hu)
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